The cardiovascular system consists of the heart and blood vessels. The heart pumps blood through three types of blood vessels - arteries, capillaries, and veins. Arteries carry blood away from the heart, capillaries allow for gas and nutrient exchange, and veins carry blood back to the heart. The cardiovascular system includes two circuits - the pulmonary circuit which circulates blood to the lungs, and the systemic circuit which circulates blood to the rest of the body. Major cardiovascular disorders include atherosclerosis, heart attack, stroke, and aneurysm. Modern medical treatments are improving diagnosis and management of these conditions.
The cardiovascular system consists of the heart and blood vessels. The heart pumps blood through two circuits - the pulmonary circuit which circulates blood to the lungs, and the systemic circuit which pumps blood to the rest of the body. Blood flows through arteries, capillaries where gas exchange occurs, and veins which return blood to the heart. The cardiovascular system works to supply oxygen and nutrients to tissues and remove wastes through complex vascular pathways and pressure gradients established by the heart. Cardiovascular disorders like atherosclerosis and hypertension can develop when this delicate system is damaged or imbalanced.
The document summarizes the key components and functions of the cardiovascular system. It describes the heart's structure including the four chambers and valves that allow blood to pass through. It explains how blood flows through two circuits, passing from the heart to the lungs and throughout the body. It also outlines the types of blood vessels involved in circulation and their roles in transporting blood under pressure away from and toward the heart.
The document summarizes the key components and functions of the cardiovascular system. It describes the heart's structure including the four chambers and valves that allow blood to pass through. It explains how blood flows through two circuits, passing from the heart to the lungs and throughout the body. It also outlines the types of blood vessels involved in circulation and their roles in transporting blood under pressure away from and toward the heart.
The cardiovascular system consists of arteries, capillaries and veins. Arteries carry oxygen-rich blood away from the heart to tissues. Capillaries allow for gas and nutrient exchange. Veins carry oxygen-depleted blood back to the heart. The pulmonary circuit carries deoxygenated blood to the lungs and oxygenated blood back to the heart. The systemic circuit pumps oxygenated blood to organs and deoxygenated blood back to the heart. Blood flow is driven by heart contractions and pressure differences between arteries, capillaries and veins.
The circulatory system is comprised of the heart, blood vessels, and lymph vessels. The heart pumps blood through two circuits - pulmonary circulation carries deoxygenated blood to the lungs and systemic circulation distributes oxygenated blood to the entire body. Blood vessels include arteries, which carry blood away from the heart, capillaries, which enable exchange of nutrients and waste, and veins, which return blood to the heart. The lymphatic system drains excess fluid from tissues and produces immune cells.
Cardiovascular System, Heart, Blood Vessel, ECG, Hypertension, Arrhythmia Audumbar Mali
Cardiovascular System,
Human Anatomy and Physiology-I,
The Blood Vessels,
The Heart,
The Electrocardiogram,
The Vascular Pathways,
As per PCI syllabus,
Atherosclerosis,
Coronary bypass operation,
Heart Transplants and Artificial Hearts
Chapter 37 lecture- Circulatory & respiratoryMary Beth Smith
The circulatory system transports blood throughout the body using the heart and blood vessels. The heart has four chambers and pumps deoxygenated blood to the lungs and oxygenated blood to the body. Blood consists of plasma, red blood cells, white blood cells, and platelets. Red blood cells carry oxygen, white blood cells fight infection, and platelets help with clotting. The lymphatic system drains fluid from tissues and returns it to the blood.
This document summarizes the structure and function of the cardiovascular system. It describes how arteries, arterioles, capillaries and veins transport blood throughout the body in two circuits - the pulmonary circuit and the systemic circuit. Key components of the heart like the atria, ventricles and valves are identified. The roles of blood pressure, blood flow and cardiac cycle are explained.
The cardiovascular system consists of the heart and blood vessels. The heart pumps blood through two circuits - the pulmonary circuit which circulates blood to the lungs, and the systemic circuit which pumps blood to the rest of the body. Blood flows through arteries, capillaries where gas exchange occurs, and veins which return blood to the heart. The cardiovascular system works to supply oxygen and nutrients to tissues and remove wastes through complex vascular pathways and pressure gradients established by the heart. Cardiovascular disorders like atherosclerosis and hypertension can develop when this delicate system is damaged or imbalanced.
The document summarizes the key components and functions of the cardiovascular system. It describes the heart's structure including the four chambers and valves that allow blood to pass through. It explains how blood flows through two circuits, passing from the heart to the lungs and throughout the body. It also outlines the types of blood vessels involved in circulation and their roles in transporting blood under pressure away from and toward the heart.
The document summarizes the key components and functions of the cardiovascular system. It describes the heart's structure including the four chambers and valves that allow blood to pass through. It explains how blood flows through two circuits, passing from the heart to the lungs and throughout the body. It also outlines the types of blood vessels involved in circulation and their roles in transporting blood under pressure away from and toward the heart.
The cardiovascular system consists of arteries, capillaries and veins. Arteries carry oxygen-rich blood away from the heart to tissues. Capillaries allow for gas and nutrient exchange. Veins carry oxygen-depleted blood back to the heart. The pulmonary circuit carries deoxygenated blood to the lungs and oxygenated blood back to the heart. The systemic circuit pumps oxygenated blood to organs and deoxygenated blood back to the heart. Blood flow is driven by heart contractions and pressure differences between arteries, capillaries and veins.
The circulatory system is comprised of the heart, blood vessels, and lymph vessels. The heart pumps blood through two circuits - pulmonary circulation carries deoxygenated blood to the lungs and systemic circulation distributes oxygenated blood to the entire body. Blood vessels include arteries, which carry blood away from the heart, capillaries, which enable exchange of nutrients and waste, and veins, which return blood to the heart. The lymphatic system drains excess fluid from tissues and produces immune cells.
Cardiovascular System, Heart, Blood Vessel, ECG, Hypertension, Arrhythmia Audumbar Mali
Cardiovascular System,
Human Anatomy and Physiology-I,
The Blood Vessels,
The Heart,
The Electrocardiogram,
The Vascular Pathways,
As per PCI syllabus,
Atherosclerosis,
Coronary bypass operation,
Heart Transplants and Artificial Hearts
Chapter 37 lecture- Circulatory & respiratoryMary Beth Smith
The circulatory system transports blood throughout the body using the heart and blood vessels. The heart has four chambers and pumps deoxygenated blood to the lungs and oxygenated blood to the body. Blood consists of plasma, red blood cells, white blood cells, and platelets. Red blood cells carry oxygen, white blood cells fight infection, and platelets help with clotting. The lymphatic system drains fluid from tissues and returns it to the blood.
This document summarizes the structure and function of the cardiovascular system. It describes how arteries, arterioles, capillaries and veins transport blood throughout the body in two circuits - the pulmonary circuit and the systemic circuit. Key components of the heart like the atria, ventricles and valves are identified. The roles of blood pressure, blood flow and cardiac cycle are explained.
The circulatory system, also known as the cardiovascular system, moves substances to and from cells and helps regulate body temperature and pH. It consists of the heart, blood, and blood vessels. The heart begins beating around 21 days after conception at a rate near the mother's, which then accelerates over the first month. Blood vessels include arteries, which carry blood away from the heart, veins, which carry blood toward the heart, and capillaries, which connect arterioles and venules and closely interact with tissues. Deoxygenated blood returns to the heart through the superior and inferior vena cavae and is pumped through the pulmonary and systemic circuits to be oxygenated in the lungs before being distributed to the body
The circulatory system consists of the heart, blood, and blood vessels. The heart pumps blood through two circuits - the pulmonary circuit, which pumps blood to the lungs to receive oxygen and remove carbon dioxide, and the systemic circuit, which pumps oxygenated blood to the rest of the body. Blood flows from the heart through arteries, then to capillaries where gas exchange occurs, then through veins back to the heart. The circulatory system transports oxygen, nutrients, hormones and waste products throughout the body.
The circulatory system consists of the heart, blood vessels, blood, and lymphatic system. The heart pumps oxygenated blood received from the lungs through arteries and returns deoxygenated blood to the lungs through veins. The circulatory system provides oxygen and nutrients to tissues and organs and removes carbon dioxide and waste.
Chapter 37- Circulatory and Respiratory SystemsMary Beth Smith
The circulatory system transports blood throughout the body via the heart and blood vessels. The heart has four chambers and uses valves to pump oxygenated blood from the lungs and deoxygenated blood to the lungs. Blood flows through arteries, capillaries, and veins. The respiratory system exchanges gases through the nose, pharynx, trachea, bronchi, and alveoli in the lungs. Breathing is controlled by the medulla oblongata and diaphragm. Smoking damages lungs and increases risk of diseases like cancer, emphysema, and bronchitis.
The circulatory system transports blood throughout the body via the heart and blood vessels. The heart has four chambers and uses valves to pump oxygenated blood from the lungs and deoxygenated blood to the lungs. Blood flows through arteries, capillaries, and veins. The respiratory system exchanges gases through the nose, pharynx, trachea, bronchi, and alveoli in the lungs. Breathing is controlled by the medulla oblongata and diaphragm. Smoking damages lungs and increases risk of diseases like cancer, emphysema, and bronchitis.
The document summarizes the circulatory system, including its major components and how it functions. It describes the heart, blood vessels (arteries, veins, capillaries), blood, and the two circuits (pulmonary and systemic). It also discusses the lymphatic system and its role in collecting fluid from tissues and returning it to blood. Key structures of both systems like the heart, blood cells, lymph nodes, and spleen are defined. The document provides an overview of how blood circulates through the body, facilitated by these circulatory and lymphatic components working together.
The circulatory system is made up of the heart, blood, and blood vessels. The heart pumps blood through arteries, veins, and capillaries to transport oxygen and nutrients to cells and remove waste. Blood vessels include arteries that carry blood away from the heart, veins that return blood to the heart, and capillaries that connect arteries and veins. The heart has four chambers to pump blood through two circuits - pulmonary circulation oxygenates blood in the lungs and systemic circulation delivers oxygenated blood throughout the body.
The document summarizes the structure and function of the cardiovascular system. It describes the three types of blood vessels - arteries, capillaries, and veins. It explains how blood flows through the heart chambers, and the role of the heart valves and muscles in pumping blood. Key concepts covered include blood pressure, the cardiac cycle, heart sounds, and neural and hormonal control of the heart.
Biology Project [Circulatory System] Vijay Raja Std Vii Navdeep With Soundvijayaswathy
My project was to prepare a presentation on human circulatory system.
This is what it finally looked like .
Hope it comes of some use to you all .
Vijay Raja
This document provides an overview of the cardiovascular system. It discusses the composition and functions of blood, the structure and layers of the heart, types of circulation including pulmonary and systemic circulation, the cardiac cycle, heart valves and conducting system, blood pressure, electrocardiograms, and some common cardiovascular disorders like hypertension and stroke. The document is intended as an educational resource on the key components and functioning of the cardiovascular system.
Human cardiovascular system, organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the blood is propelled by a muscular heart. Two circuits, the pulmonary and the systemic, consist of arterial, capillary, and venous components.
The primary function of the heart is to serve as a muscular pump propelling blood into and through vessels to and from all parts of the body. The arteries, which receive this blood at high pressure and velocity and conduct it throughout the body, have thick walls that are composed of elastic fibrous tissue and muscle cells. The arterial tree—the branching system of arteries—terminates in short, narrow, muscular vessels called arterioles, from which blood enters simple endothelial tubes (i.e., tubes formed of endothelial, or lining, cells) known as capillaries. These thin, microscopic capillaries are permeable to vital cellular nutrients and waste products that they receive and distribute. From the capillaries, the blood, now depleted of oxygen and burdened with waste products, moving more slowly and under low pressure, enters small vessels called venules that converge to form veins, ultimately guiding the blood on its way back to the heart.
The document discusses cardiovascular physiology, including the composition of blood, blood circulation, and the functions of the heart. It notes that blood is composed of erythrocytes, leukocytes, platelets, and plasma. Blood circulates through arteries, capillaries, and veins via the pumping action of the heart. The four chambers of the heart work together with four valves to oxygenate blood in the lungs and circulate it throughout the body in the pulmonary and systemic circuits.
The document describes the key components and functioning of the cardiovascular or circulatory system. It discusses the heart, blood vessels including arteries, veins and capillaries, blood flow, and regulation of the cardiovascular system. It also briefly mentions some common cardiovascular disorders like atherosclerosis, heart attack, and stroke.
The circulatory system transports blood, nutrients, oxygen, hormones, and other materials throughout the body. It consists of the cardiovascular system, which circulates blood, and the lymphatic system, which circulates lymph. Blood is pumped from the heart through arteries and returns to the heart through veins. The lymphatic system returns filtered blood plasma from tissues as lymph. Hemodynamics refers to the study of blood flow and circulation. Key factors that influence blood flow include blood pressure, vessel diameter, blood viscosity, and respiration.
The document discusses the human circulatory system. It describes the double circulation of blood through the pulmonary and systemic circuits. Blood is transported through arteries, veins, and capillaries. The heart has four chambers and pumps deoxygenated blood to the lungs and oxygenated blood to the body. The cardiac cycle involves rhythmic contractions and relaxations of the heart. The lymphatic system returns fluid to the bloodstream. Common cardiovascular diseases result from issues like blockages or ruptures in blood vessels.
The circulatory system transports nutrients, gases, hormones, blood cells, etc. to and from cells in the body. It consists of the heart, blood vessels (arteries, veins, capillaries), and blood. The heart pumps blood through blood vessels to supply oxygen and remove carbon dioxide from tissues throughout the body. Blood contains plasma, red blood cells, white blood cells, and platelets. The circulatory system also helps fight infections and regulates body temperature.
The cardiovascular system circulates blood throughout the body via the heart and blood vessels. The heart is a hollow, muscular organ located in the chest that pumps blood through two circuits: systemic circulation and pulmonary circulation. Systemic circulation pumps oxygenated blood from the heart to the body and returns deoxygenated blood to the heart. Pulmonary circulation pumps deoxygenated blood from the heart to the lungs to be oxygenated and returns oxygenated blood to the heart. The cardiovascular system is regulated by short term mechanisms like the autonomic nervous system and long term mechanisms like the renin-angiotensin-aldosterone system to maintain normal blood pressure.
The respiratory and circulatory systems work together to transport oxygen and remove waste. The respiratory system exchanges gases in the lungs through alveoli, bringing oxygen into the blood and removing carbon dioxide. The circulatory system consists of the heart, arteries, veins and capillaries that transport blood throughout the body, delivering oxygen and nutrients to cells and picking up carbon dioxide and waste. Together these systems maintain homeostasis in the body.
The respiratory and circulatory systems work together to transport oxygen and remove wastes. The respiratory system exchanges gases in the lungs through the bronchi, bronchioles, and alveoli. The circulatory system moves blood throughout the body via arteries, veins and capillaries to transport oxygen, nutrients and remove carbon dioxide and wastes. Both systems function to maintain homeostasis in the body.
The circulatory system includes the heart, blood vessels, and blood, and is responsible for circulating blood throughout the body. The heart pumps blood through three types of blood vessels - arteries, capillaries, and veins. Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Capillaries allow for the exchange of oxygen, nutrients, waste, etc. between the blood and body tissues. The circulatory system helps deliver oxygen, hormones, and nutrients to organs and tissues and removes waste.
This document discusses mixing theory and equipment used for mixing. It begins by defining mixing and classifying mixing into types including mixing of solids, liquids, and semisolids. It then describes various mechanisms of mixing like convective mixing, shear mixing, and diffusion mixing. It provides details on factors influencing mixing of solids and statistical parameters used to evaluate mixing. The document also classifies and describes various types of mixing equipment used for solids and liquids along with their principles, construction, working, advantages and applications.
The document discusses various methods of size reduction used in pharmaceutical processing. It describes common size reduction equipment like ball mills, fluid energy mills, colloidal mills, and hammer mills. For each method and equipment, it provides details on working principles, advantages, disadvantages, and applications. It also discusses theories of size reduction proposed by Rittinger, Bond, and Kick which relate energy requirements to changes in particle size and surface area.
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The circulatory system, also known as the cardiovascular system, moves substances to and from cells and helps regulate body temperature and pH. It consists of the heart, blood, and blood vessels. The heart begins beating around 21 days after conception at a rate near the mother's, which then accelerates over the first month. Blood vessels include arteries, which carry blood away from the heart, veins, which carry blood toward the heart, and capillaries, which connect arterioles and venules and closely interact with tissues. Deoxygenated blood returns to the heart through the superior and inferior vena cavae and is pumped through the pulmonary and systemic circuits to be oxygenated in the lungs before being distributed to the body
The circulatory system consists of the heart, blood, and blood vessels. The heart pumps blood through two circuits - the pulmonary circuit, which pumps blood to the lungs to receive oxygen and remove carbon dioxide, and the systemic circuit, which pumps oxygenated blood to the rest of the body. Blood flows from the heart through arteries, then to capillaries where gas exchange occurs, then through veins back to the heart. The circulatory system transports oxygen, nutrients, hormones and waste products throughout the body.
The circulatory system consists of the heart, blood vessels, blood, and lymphatic system. The heart pumps oxygenated blood received from the lungs through arteries and returns deoxygenated blood to the lungs through veins. The circulatory system provides oxygen and nutrients to tissues and organs and removes carbon dioxide and waste.
Chapter 37- Circulatory and Respiratory SystemsMary Beth Smith
The circulatory system transports blood throughout the body via the heart and blood vessels. The heart has four chambers and uses valves to pump oxygenated blood from the lungs and deoxygenated blood to the lungs. Blood flows through arteries, capillaries, and veins. The respiratory system exchanges gases through the nose, pharynx, trachea, bronchi, and alveoli in the lungs. Breathing is controlled by the medulla oblongata and diaphragm. Smoking damages lungs and increases risk of diseases like cancer, emphysema, and bronchitis.
The circulatory system transports blood throughout the body via the heart and blood vessels. The heart has four chambers and uses valves to pump oxygenated blood from the lungs and deoxygenated blood to the lungs. Blood flows through arteries, capillaries, and veins. The respiratory system exchanges gases through the nose, pharynx, trachea, bronchi, and alveoli in the lungs. Breathing is controlled by the medulla oblongata and diaphragm. Smoking damages lungs and increases risk of diseases like cancer, emphysema, and bronchitis.
The document summarizes the circulatory system, including its major components and how it functions. It describes the heart, blood vessels (arteries, veins, capillaries), blood, and the two circuits (pulmonary and systemic). It also discusses the lymphatic system and its role in collecting fluid from tissues and returning it to blood. Key structures of both systems like the heart, blood cells, lymph nodes, and spleen are defined. The document provides an overview of how blood circulates through the body, facilitated by these circulatory and lymphatic components working together.
The circulatory system is made up of the heart, blood, and blood vessels. The heart pumps blood through arteries, veins, and capillaries to transport oxygen and nutrients to cells and remove waste. Blood vessels include arteries that carry blood away from the heart, veins that return blood to the heart, and capillaries that connect arteries and veins. The heart has four chambers to pump blood through two circuits - pulmonary circulation oxygenates blood in the lungs and systemic circulation delivers oxygenated blood throughout the body.
The document summarizes the structure and function of the cardiovascular system. It describes the three types of blood vessels - arteries, capillaries, and veins. It explains how blood flows through the heart chambers, and the role of the heart valves and muscles in pumping blood. Key concepts covered include blood pressure, the cardiac cycle, heart sounds, and neural and hormonal control of the heart.
Biology Project [Circulatory System] Vijay Raja Std Vii Navdeep With Soundvijayaswathy
My project was to prepare a presentation on human circulatory system.
This is what it finally looked like .
Hope it comes of some use to you all .
Vijay Raja
This document provides an overview of the cardiovascular system. It discusses the composition and functions of blood, the structure and layers of the heart, types of circulation including pulmonary and systemic circulation, the cardiac cycle, heart valves and conducting system, blood pressure, electrocardiograms, and some common cardiovascular disorders like hypertension and stroke. The document is intended as an educational resource on the key components and functioning of the cardiovascular system.
Human cardiovascular system, organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the blood is propelled by a muscular heart. Two circuits, the pulmonary and the systemic, consist of arterial, capillary, and venous components.
The primary function of the heart is to serve as a muscular pump propelling blood into and through vessels to and from all parts of the body. The arteries, which receive this blood at high pressure and velocity and conduct it throughout the body, have thick walls that are composed of elastic fibrous tissue and muscle cells. The arterial tree—the branching system of arteries—terminates in short, narrow, muscular vessels called arterioles, from which blood enters simple endothelial tubes (i.e., tubes formed of endothelial, or lining, cells) known as capillaries. These thin, microscopic capillaries are permeable to vital cellular nutrients and waste products that they receive and distribute. From the capillaries, the blood, now depleted of oxygen and burdened with waste products, moving more slowly and under low pressure, enters small vessels called venules that converge to form veins, ultimately guiding the blood on its way back to the heart.
The document discusses cardiovascular physiology, including the composition of blood, blood circulation, and the functions of the heart. It notes that blood is composed of erythrocytes, leukocytes, platelets, and plasma. Blood circulates through arteries, capillaries, and veins via the pumping action of the heart. The four chambers of the heart work together with four valves to oxygenate blood in the lungs and circulate it throughout the body in the pulmonary and systemic circuits.
The document describes the key components and functioning of the cardiovascular or circulatory system. It discusses the heart, blood vessels including arteries, veins and capillaries, blood flow, and regulation of the cardiovascular system. It also briefly mentions some common cardiovascular disorders like atherosclerosis, heart attack, and stroke.
The circulatory system transports blood, nutrients, oxygen, hormones, and other materials throughout the body. It consists of the cardiovascular system, which circulates blood, and the lymphatic system, which circulates lymph. Blood is pumped from the heart through arteries and returns to the heart through veins. The lymphatic system returns filtered blood plasma from tissues as lymph. Hemodynamics refers to the study of blood flow and circulation. Key factors that influence blood flow include blood pressure, vessel diameter, blood viscosity, and respiration.
The document discusses the human circulatory system. It describes the double circulation of blood through the pulmonary and systemic circuits. Blood is transported through arteries, veins, and capillaries. The heart has four chambers and pumps deoxygenated blood to the lungs and oxygenated blood to the body. The cardiac cycle involves rhythmic contractions and relaxations of the heart. The lymphatic system returns fluid to the bloodstream. Common cardiovascular diseases result from issues like blockages or ruptures in blood vessels.
The circulatory system transports nutrients, gases, hormones, blood cells, etc. to and from cells in the body. It consists of the heart, blood vessels (arteries, veins, capillaries), and blood. The heart pumps blood through blood vessels to supply oxygen and remove carbon dioxide from tissues throughout the body. Blood contains plasma, red blood cells, white blood cells, and platelets. The circulatory system also helps fight infections and regulates body temperature.
The cardiovascular system circulates blood throughout the body via the heart and blood vessels. The heart is a hollow, muscular organ located in the chest that pumps blood through two circuits: systemic circulation and pulmonary circulation. Systemic circulation pumps oxygenated blood from the heart to the body and returns deoxygenated blood to the heart. Pulmonary circulation pumps deoxygenated blood from the heart to the lungs to be oxygenated and returns oxygenated blood to the heart. The cardiovascular system is regulated by short term mechanisms like the autonomic nervous system and long term mechanisms like the renin-angiotensin-aldosterone system to maintain normal blood pressure.
The respiratory and circulatory systems work together to transport oxygen and remove waste. The respiratory system exchanges gases in the lungs through alveoli, bringing oxygen into the blood and removing carbon dioxide. The circulatory system consists of the heart, arteries, veins and capillaries that transport blood throughout the body, delivering oxygen and nutrients to cells and picking up carbon dioxide and waste. Together these systems maintain homeostasis in the body.
The respiratory and circulatory systems work together to transport oxygen and remove wastes. The respiratory system exchanges gases in the lungs through the bronchi, bronchioles, and alveoli. The circulatory system moves blood throughout the body via arteries, veins and capillaries to transport oxygen, nutrients and remove carbon dioxide and wastes. Both systems function to maintain homeostasis in the body.
The circulatory system includes the heart, blood vessels, and blood, and is responsible for circulating blood throughout the body. The heart pumps blood through three types of blood vessels - arteries, capillaries, and veins. Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Capillaries allow for the exchange of oxygen, nutrients, waste, etc. between the blood and body tissues. The circulatory system helps deliver oxygen, hormones, and nutrients to organs and tissues and removes waste.
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BIOSYNTHESIS OF PURINES & PYRIMIDINES.pptxsafuraqazi
Purines and pyrimidines are biologically synthesized as nucleotides and ribosides which are the bases attached to ribose 5-phosphate. They serve as building blocks for nucleic acids, with ATP playing an important role in energy transformation and regulation of metabolic pathways. De novo purine synthesis involves multiple steps to produce nucleotides from simple precursors, while salvage pathways recycle bases and nucleosides formed during RNA and DNA degradation in a more energy-efficient manner. De novo pyrimidine synthesis specifically produces UMP from carbamoyl phosphate via the orotate pathway. The interaction between purine and pyrimidine formation establishes a balance important for DNA synthesis.
Beta oxidation is the catabolic process that breaks down fatty acids to generate acetyl-CoA and co-enzymes like NADH and FADH2. It occurs in the cytosol of prokaryotes and mitochondria of eukaryotes. The beta carbon of fatty acids is oxidized to a carbonyl group, giving this process its name. In the mitochondria, beta-oxidation is facilitated by the trifunctional protein enzyme complex in the inner mitochondrial membrane.
The document contains 18 multiple choice questions covering various topics in pharmacology including toxicology, animal experimentation, mechanisms of action, medications, and drug-drug interactions. The questions test knowledge about managing poison inhalation, antidotes for specific poisons, treatment of belladonna poisoning, drugs used for lead poisoning and snake bite, infectious diseases guinea pigs are useful for studying, examples of omnivores, mechanisms of action of parasympatholytics and local anesthetics, life-saving and antipsychotic medications, treatment for leprosy, and the type of interaction that occurs when activated charcoal is used as an antidote.
1. The electron transport chain transfers electrons from electron donors like NADH to electron acceptors like oxygen. This process pumps protons across the inner mitochondrial membrane, creating an electrochemical gradient.
2. Oxidative phosphorylation couples the electron transport chain to ATP synthase. As protons diffuse back into the matrix through ATP synthase, this drives the production of ATP from ADP and inorganic phosphate.
3. The electron transport chain consists of four protein complexes along the inner mitochondrial membrane and two shuttle systems to transfer electrons from the cytoplasm. As electrons are passed from one complex to another, protons are pumped from the matrix to the intermembrane space.
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Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Reimagining Your Library Space: How to Increase the Vibes in Your Library No ...Diana Rendina
Librarians are leading the way in creating future-ready citizens – now we need to update our spaces to match. In this session, attendees will get inspiration for transforming their library spaces. You’ll learn how to survey students and patrons, create a focus group, and use design thinking to brainstorm ideas for your space. We’ll discuss budget friendly ways to change your space as well as how to find funding. No matter where you’re at, you’ll find ideas for reimagining your space in this session.
2. The Blood Vessels
The cardiovascular system has three
types of blood vessels:
Arteries (and arterioles) – carry blood
away from the heart
Capillaries – where nutrient and gas
exchange occur
Veins (and venules) – carry blood toward
the heart.
4. The Arteries
Arteries and arterioles take blood
away from the heart.
The largest artery is the aorta.
The middle layer of an artery wall
consists of smooth muscle that can
constrict to regulate blood flow and
blood pressure.
Arterioles can constrict or dilate,
changing blood pressure.
5. The Capillaries
Capillaries have walls only one cell thick to
allow exchange of gases and nutrients
with tissue fluid.
Capillary beds are present in all regions of
the body but not all capillary beds are
open at the same time.
Contraction of a sphincter muscle closes
off a bed and blood can flow through an
arteriovenous shunt that bypasses the
capillary bed.
7. The Veins
Venules drain blood from capillaries,
then join to form veins that take blood
to the heart.
Veins have much less smooth muscle
and connective tissue than arteries.
Veins often have valves that prevent
the backward flow of blood when
closed.
Veins carry about 70% of the body’s
blood and act as a reservoir during
hemorrhage.
8. The heart is a cone-shaped, muscular
organ located between the lungs
behind the sternum.
The heart muscle forms the
myocardium, with tightly interconnect
cells of cardiac muscle tissue.
The pericardium is the outer
membranous sac with lubricating fluid.
The Heart
9. The heart has four chambers: two upper,
thin-walled atria, and two lower, thick-
walled ventricles.
The septum is a wall dividing the right
and left sides.
Atrioventricular valves occur between the
atria and ventricles – the tricuspid valve
on the right and the bicuspid valve on the
left; both valves are reenforced by
chordae tendinae attached to muscular
projections within the ventricles.
12. Passage of Blood Through
the Heart
Blood follows this sequence through the
heart: superior and inferior vena cava →
right atrium → tricuspid valve → right
ventricle → pulmonary semilunar valve →
pulmonary trunk and arteries to the lungs
→ pulmonary veins leaving the lungs →left
atrium → bicuspid valve → left ventricle →
aortic semilunar valve → aorta → to the
body.
14. The pumping of the heart sends out
blood under pressure to the arteries.
Blood pressure is greatest in the
aorta; the wall of the left ventricle is
thicker than that of the right ventricle
and pumps blood to the entire body.
Blood pressure then decreases as the
cross-sectional area of arteries and
then arterioles increases.
16. The Heartbeat
Each heartbeat is called a cardiac cycle.
When the heart beats, the two atria
contract together, then the two
ventricles contract; then the whole heart
relaxes.
Systole is the contraction of heart
chambers; diastole is their relaxation.
The heart sounds, lub-dup, are due to
the closing of the atrioventricular valves,
followed by the closing of the semilunar
valves.
17. Intrinsic Control of Heartbeat
The SA (sinoatrial) node, or pacemaker,
initiates the heartbeat and causes the
atria to contract on average every 0.85
seconds.
The AV (atrioventricular) node conveys
the stimulus and initiates contraction of
the ventricles.
The signal for the ventricles to contract
travels from the AV node through the
atrioventricular bundle to the smaller
Purkinje fibers.
19. Extrinsic Control of Heartbeat
A cardiac control center in the medulla
oblongata speeds up or slows down the
heart rate by way of the autonomic
nervous system branches:
parasympathetic system (slows heart
rate) and the sympathetic system
(increases heart rate).
Hormones epinephrine and
norepinephrine from the adrenal
medulla also stimulate faster heart rate.
20. The Electrocardiogram
An electrocardiogram (ECG) is a
recording of the electrical changes
that occur in the myocardium during a
cardiac cycle.
Atrial depolarization creates the P
wave, ventricle depolarization creates
the QRS wave, and repolarization of
the ventricles produces the T wave.
22. The Vascular Pathways
The cardiovascular system includes
two circuits:
2) Pulmonary circuit which circulates
blood through the lungs, and
3) Systemic circuit which circulates
blood to the rest of the body.
4) Both circuits are vital to homeostasis.
24. The Pulmonary Circuit
The pulmonary circuit begins with the
pulmonary trunk from the right ventricle
which branches into two pulmonary
arteries that take oxygen-poor blood to
the lungs.
In the lungs, oxygen diffuses into the
blood, and carbon dioxide diffuses out
of the blood to be expelled by the
lungs.
Four pulmonary veins return oxygen-
rich blood to the left atrium.
25. The Systemic Circuit
The systemic circuit starts with the
aorta carrying O2-rich blood from the
left ventricle.
The aorta branches with an artery going
to each specific organ.
Generally, an artery divides into
arterioles and capillaries which then
lead to venules.
26. The vein that takes blood to the vena cava
often has the same name as the artery
that delivered blood to the organ.
In the adult systemic circuit, arteries
carry blood that is relatively high in
oxygen and relatively low in carbon
dioxide, and veins carry blood that is
relatively low in oxygen and relatively high
in carbon dioxide.
This is the reverse of the pulmonary
circuit.
28. The coronary arteries serve the heart
muscle itself; they are the first branch
off the aorta.
Since the coronary arteries are so
small, they are easily clogged, leading
to heart disease.
The hepatic portal system carries
blood rich in nutrients from digestion
in the small intestine to the liver, the
organ that monitors the composition
of the blood.
29. Blood Flow
The beating of the heart is necessary
to homeostasis because it creates
pressure that propels blood in arteries
and the arterioles.
Arterioles lead to the capillaries where
nutrient and gas exchange with tissue
fluid takes place.
30. Blood Flow in Arteries
Blood pressure due to the pumping of
the heart accounts for the flow of blood
in the arteries.
Systolic pressure is high when the heart
expels the blood.
Diastolic pressure occurs when the heart
ventricles are relaxing.
Both pressures decrease with distance
from the left ventricle because blood
enters more and more arterioles and
arteries.
32. Blood Flow in Capillaries
Blood moves slowly in capillaries
because there are more capillaries
than arterioles.
This allows time for substances to be
exchanged between the blood and
tissues.
33. Blood Flow in Veins
Venous blood flow is dependent upon:
2) skeletal muscle contraction,
3) presence of valves in veins, and
4) respiratory movements.
Compression of veins causes blood to
move forward past a valve that then
prevents it from returning backward.
34. Changes in thoracic and abdominal
pressure that occur with breathing also
assist in the return of blood.
Varicose veins develop when the valves of
veins become weak.
Hemorrhoids (piles) are due to varicose
veins in the rectum.
Phlebitis is inflammation of a vein and can
lead to a blood clot and possible death if
the clot is dislodged and is carried to a
pulmonary vessel.
35. Blood
Blood separates into two main parts: plasma
and formed elements.
Plasma accounts for 55% and formed
elements 45% of blood volume.
Plasma contains mostly water (90–92%) and
plasma proteins (7–8%), but it also contains
nutrients and wastes.
Albumin is a large plasma protein that
transports bilirubin; globulins are plasma
proteins that transport lipoproteins.
37. The Red Blood Cells
Red blood cells (erythrocytes or RBCs) are
made in the red bone marrow of the skull,
ribs, vertebrae, and the ends of long
bones.
Normally there are 4 to 6 million RBCs per
mm3 of whole blood.
Red blood cells contain the pigment
hemoglobin for oxygen transport;
hemogobin contains heme, a complex iron-
containing group that transports oxygen in
the blood.
39. The air pollutant carbon monoxide
combines more readily with
hemoglobin than does oxygen,
resulting in oxygen deprivation and
possible death.
Red blood cells lack a nucleus and
have a 120 day life span.
When worn out, the red blood cells
are dismantled in the liver and spleen.
40. Iron is reused by the red bone marrow
where stem cells continually produce more
red blood cells; the remainder of the heme
portion undergoes chemical degradation
and is excreted as bile pigments into the
bile.
Lack of enough hemoglobin results in
anemia.
The kidneys produce the hormone
erythropoietin to increase blood cell
production when oxygen levels are low.
41. The White Blood Cells
White blood cells (leukocytes) have nuclei,
are fewer in number than RBCs, with
5,000 – 10,000 cells per mm3, and defend
against disease.
Leukocytes are divided into granular and
agranular based on appearance.
Granular leukocytes (neutrophils,
eosinophils, and basophils) contain
enzymes and proteins that defend the
body against microbes.
42. The aganular leukocytes (monocytes and
lymphocytes) have a spherical or kidney-
shaped nucleus.
Monocytes can differentiate into
macrophages that phagocytize microbes
and stimulate other cells to defend the
body.
Lymphocytes are involved in immunity.
An excessive number of white blood cells
may indicate an infection or leukemia; HIV
infection drastically reduces the number of
lymphocytes.
44. The Platelets and Blood
Clotting
Red bone marrow produces large cells
called megakaryocytes that fragment into
platelets at a rate of 200 billion per day;
blood contains 150,000–300,000 platelets
per mm3.
Twelve clotting factors in the blood help
platelets form blood clots.
45. Blood Clotting
Injured tissues release a clotting factor
called prothrombin activator, which
converts prothrombin into thrombin.
Thrombin, in turn, acts as an enzyme and
converts fibrinogen into insoluble threads
of fibrin.
These conversions require the presence of
calcium ions (Ca2+).
Trapped red blood cells make a clot
appear red.
47. Hemophilia
Hemophilia is an inherited clotting disorder
due to a deficiency in a clotting factor.
Bumps and falls cause bleeding in the
joints; cartilage degeneration and
resorption of bone can follow.
The most frequent cause of death is
bleeding into the brain with accompanying
neurological damage.
48. Bone Marrow StemCells
A stem cell is capable of dividing into
new cells that differentiate into
particular cell types.
Bone marrow is multipotent, able to
continually give rise to particular types
of blood cells.
The skin and brain also have stem cells,
and mesenchymal stem cells give rise to
connective tissues including heart
muscle.
50. Capillary Exchange
At the arteriole end of a capillary, water
moves out of the blood due to the force of
blood pressure.
At the venule end, water moves into the
blood due to osmotic pressure of the
blood.
Substances that leave the blood contribute
to tissue fluid, the fluid between the
body’s cells.
51. In the midsection of the capillary,
nutrients diffuse out and wastes diffuse
into the blood.
Since plasma proteins are too large to
readily pass out of the capillary, tissue
fluid tends to contain all components of
plasma except it has lesser amounts of
protein.
Excess tissue fluid is returned to the blood
stream as lymph in lymphatic vessels.
53. Cardiovascular Disorders
Cardiovascular disease (CVD) is the
leading cause of death in Western
countries.
Modern research efforts have improved
diagnosis, treatment, and prevention.
Major cardiovascular disorders include
atherosclerosis, stroke, heart attack,
aneurysm, and hypertension.
54. Atherosclerosis
Atherosclerosis is due to a build-up of
fatty material (plaque), mainly
cholesterol, under the inner lining of
arteries.
The plaque can cause a thrombus (blood
clot) to form.
The thrombus can dislodge as an embolus
and lead to thromboembolism.
55. Stroke, Heart Attack, and
Aneurysm
A cerebrovascular accident, or stroke,
results when an embolus lodges in a
cerebral blood vessel or a cerebral blood
vessel bursts; a portion of the brain dies
due to lack of oxygen.
A myocardial infarction, or heart attack,
occurs when a portion of heart muscle
dies due to lack of oxygen.
56. Partial blockage of a coronary artery
causes angina pectoris, or chest pain.
An aneurysm is a ballooning of a blood
vessel, usually in the abdominal aorta or
arteries leading to the brain.
Death results if the aneurysm is in a large
vessel and the vessel bursts.
Atherosclerosis and hypertension weaken
blood vessels over time, increasing the
risk of aneurysm.
57. Coronary Bypass Operations
A coronary bypass operation involves
removing a segment of another blood
vessel and replacing a clogged coronary
artery.
It may be possible to replace this
surgery with gene therapy that
stimulates new blood vessels to grow
where the heart needs more blood flow.
59. Clearing Clogged Arteries
Angioplasty uses a long tube threaded
through an arm or leg vessel to the
point where the coronary artery is
blocked; inflating the tube forces the
vessel open.
Small metal stents are expanded inside
the artery to keep it open.
Stents are coated with heparin to
prevent blood clotting and with
chemicals to prevent arterial closing.
61. Dissolving Blood Clots
Medical treatments for dissolving blood
clots include use of t-PA (tissue
plasminogen activator) that converts
plasminogen into plasmin, an enzyme that
dissolves blood clots, but can cause brain
bleeding.
Aspirin reduces the stickiness of platelets
and reduces clot formation and lowers the
risk of heart attack.
62. Heart Transplants and Artificial
Hearts
Heart transplants are routinely
performed but immunosuppressive drugs
must be taken thereafter.
There is a shortage of human organ
donors.
Work is currently underway to improve
self-contained artificial hearts, and
muscle cell transplants may someday be
useful.
63. Hypertension
About 20% of Americans suffer from
hypertension (high blood pressure).
Hypertension is present when systolic
pressure is 140 or greater or diastolic
pressure is 100 or greater; diastolic pressure
is emphasized when medical treatment is
considered.
A genetic predisposition for hypertension
occurs in those who have a gene that codes
for angiotensinogen, a powerful
vasoconstrictor.