Blood Pressure
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Blood pressure is generated by the contraction of the heart ventricle which pumps blood through narrow capillaries and arterioles, creating resistance. Systolic pressure occurs when the heart contracts while diastolic pressure is lower but present when arteriole walls contract. Regulation involves oscillation through signals that change smooth muscle state in arteriole walls, causing vasoconstriction or vasodilation. Gravity also impacts as animals like giraffes have higher blood pressure to pump blood against gravity to the brain.
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The circulatory system transports blood around the body using the heart as a pump and a network of arteries, veins and capillaries. Deoxygenated blood enters the right side of the heart and is pumped to the lungs, where it receives oxygen and returns to the left side to be pumped through the body. Blood pressure is highest when the heart contracts and lowest when it relaxes. Nerves regulate heart rate and blood vessel diameter in response to stress and activity levels.
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The circulatory system transports blood around the body using the heart as a pump and a network of arteries, veins and capillaries. Deoxygenated blood enters the right side of the heart and is pumped to the lungs, where it receives oxygen and returns to the left side to be pumped through the body. Blood pressure is highest when the heart contracts and lowest when it relaxes. Nerves regulate heart rate and blood vessel diameter in response to stress and activity levels.
5.1 Blood Vessels.pptx
Blood vessels are hollow tubes that transport blood throughout the body via the cardiovascular system. There are three main types of blood vessels - arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart while veins carry deoxygenated blood back to the heart. Capillaries connect arteries and veins and allow for the exchange of oxygen and carbon dioxide between blood and body tissues. The walls of arteries are thicker than veins to withstand the higher pressure of blood flowing away from the heart.
Blood Vessels
The circulatory system circulates blood and lymph throughout the body using the heart, blood vessels, and lymph vessels. The circulatory system transports gases, nutrients, hormones, wastes and other substances. There are three major types of blood vessels - arteries carry blood away from the heart, capillaries enable exchange between blood and tissues, and veins carry blood from capillaries back toward the heart. Blood flows from the arteries into smaller arterioles and capillaries, then into venules and veins which drain into the heart. Blood pressure is the pressure exerted by blood against vessel walls and is measured using a sphygmomanometer.
Cardiovascular System
The document describes the anatomy and physiology of the heart. It discusses the location of the heart in the thorax, its coverings including the pericardium, and internal layers. It describes the major vessels that supply and drain blood from the heart. It details the conduction system that coordinates heart contractions, the cardiac cycle, and factors regulating cardiac output. It also discusses congenital heart defects and conditions like congestive heart failure.
Circulatory system of human being its structure function types and comparison...
It includes a comprehensive description of circulatory system, its structure function and types.
It also includes diagrammatic representation of various parts circuits and working of human circulation.
Cardiovascular System, Heart, Blood Vessel, ECG, Hypertension, Arrhythmia
Cardiovascular System,
Human Anatomy and Physiology-I,
The Blood Vessels,
The Heart,
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Heart Transplants and Artificial Hearts
Cardiovascular system.ppsx
The cardiovascular system consists of the circulatory system (heart and blood vessels) and lymphatic system (lymph nodes and vessels). The heart pumps oxygenated blood into the systemic circulation and deoxygenated blood into the pulmonary circulation. It has four chambers and uses electrical signals and mechanical contractions to circulate blood continuously. The cardiac cycle involves atrial and ventricular systole (contraction) and diastole (relaxation). Cardiac output is determined by stroke volume and heart rate. Venous return, arterial pressure, blood volume, respiration, and skeletal muscle pumps influence blood flow.
Anatomy lab. 6 cardiovascular sys.
The cardiovascular system consists of the heart and blood vessels. The heart is a cone-shaped organ located in the thoracic cavity between the lungs. It has four chambers - two upper atria and two lower ventricles separated by valves. Blood flows from the right atrium to ventricle to lungs then left atrium to ventricle and out to the body via the aorta. The cardiovascular system transports blood to the lungs for oxygenation and throughout the body, circulating nutrients and removing waste.
cardiovascular system
The document summarizes the cardiovascular system, including the circulatory and lymphatic systems. It describes the heart, blood vessels, blood flow through pulmonary and systemic circulation. It also discusses common diseases like atherosclerosis, heart attack, angina, and their diagnosis and treatment. The circulatory system functions to transport blood throughout the body, while the lymphatic system transports lymph and maintains fluid balance.
Cardiovascular system
The cardiovascular system consists of the heart and blood vessels. The heart is hollow and located in the thorax, protected by the pericardium. It pumps blood through the circulatory system via contraction and relaxation in a cardiac cycle. Blood flow is regulated by arteries, veins and capillaries which allow for gas and nutrient exchange. Blood pressure and flow are influenced by many factors including the heart, blood properties and vessel dynamics.
Cardiovascular system
The cardiovascular system consists of the heart and blood vessels. The heart is hollow and located in the thorax, protected by the pericardium. It pumps blood through the circulatory system via contraction and relaxation. Blood flows from the heart through arteries, then capillaries where gas exchange occurs, and returns to the heart through veins, aided by valves. The heart's rhythm is regulated by electrical conduction pathways and nerves.
Cardiovascular System
The circulatory system consists of the heart and blood vessels. The heart has four chambers and uses valves to pump blood through two circuits. Deoxygenated blood enters the right side of the heart and is pumped to the lungs, where it releases carbon dioxide and picks up oxygen before returning to the left side of heart to be pumped throughout the body. Blood flows through arteries, capillaries where gas exchange occurs, and veins, and is propelled by blood pressure generated with each heartbeat.
Cape biology unit 2 -_circulatory_system_in_humans_and_exercise
The circulatory system transports blood, nutrients, gases, hormones, and wastes throughout the body via the heart and blood vessels. The human circulatory system is a double circulatory system, with the heart having four chambers that separate oxygenated and deoxygenated blood. Blood flows from the heart through arteries, then narrows into arterioles before reaching capillaries where gas, nutrient and waste exchange occurs. Venules collect blood from capillaries which flows back to the heart through increasingly large veins. The heart pumps blood in a repeating cardiac cycle of atrial systole, ventricular systole and diastole.
Cardiovascular system
The cardiovascular system, also called the circulatory system, is comprised of the heart and blood vessels. The heart pumps oxygenated blood received from the lungs through the left side of the heart into the systemic circulation, where it circulates through arteries, capillaries, and veins to deliver oxygen and nutrients to tissues before returning deoxygenated blood to the right side of the heart and lungs to become reoxygenated. The cardiovascular system also transports hormones, waste products, carbon dioxide, and other materials throughout the body. Disorders of the circulatory system include anemia, leukemia, hemophilia, heart murmurs, and heart attacks.
CARDIOVASCULAR SYSTEM 12.pptx
The cardiovascular system consists of the heart and blood vessels. The heart pumps blood through a closed system of arteries, veins, and capillaries. The heart has four chambers and uses valves to ensure one-way blood flow. It is located in the thorax and has a conduction system that maintains the cardiac cycle of contraction and relaxation. Blood circulation allows for gas and nutrient exchange via capillaries. Vital signs like pulse and blood pressure provide information on cardiovascular function and efficiency.
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Blood Pressure
- 2. Contraction of heart ventricle Blood flows from areas of higher pressure (heart) to areas of lower pressure The narrow diameter of capillaries and arterioles generates substantial resistance to blood flow
- 3. Systolic pressure - arteriole blood pressure when heart contracts during ventricular systole to push the blood outwards from the heart Diastolic pressure – lower but substantial blood pressure when the arteriole walls contract, pushing blood out
- 4. Regulation of Blood Pressure Oscillation Signals (nitric acid) can also change the state of smooth muscles in arteriole walls Vasocontriction (endothelin) – contraction Vasodilation – relaxation
- 5. Gravity The head is always at a higher position than one’s hearts Heart has higher blood pressure Animals w/ long necks have more difficulty in pumping blood against gravity towards its brain Blood pressure in veins is slow but several mechanisms, like the walls of venules, assist the return of blood to the heart