A closed system of the heart and blood vessels
The heart pumps blood
Blood vessels allow blood to circulate to all parts of the body
The function of the cardiovascular system is to deliver oxygen and nutrients and to remove carbon dioxide and other waste products
A closed system of the heart and blood vessels
The heart pumps blood
Blood vessels allow blood to circulate to all parts of the body
The function of the cardiovascular system is to deliver oxygen and nutrients and to remove carbon dioxide and other waste products
The cardiovascular system can be thought of as the transport system of the body.
This system has three main components: the heart, the blood vessel and the blood itself.
The heart is the system’s pump and the blood vessels are like the delivery routes.
This presentation is a combination of different slides which I re-purposed. I included a reference of all the slides I used at the end of my presentation.
A closed system of the heart and blood vessels
The heart pumps blood
Blood vessels allow blood to circulate to all parts of the body
The function of the cardiovascular system is to deliver oxygen and nutrients and to remove carbon dioxide and other waste products
A closed system of the heart and blood vessels
The heart pumps blood
Blood vessels allow blood to circulate to all parts of the body
The function of the cardiovascular system is to deliver oxygen and nutrients and to remove carbon dioxide and other waste products
The cardiovascular system can be thought of as the transport system of the body.
This system has three main components: the heart, the blood vessel and the blood itself.
The heart is the system’s pump and the blood vessels are like the delivery routes.
This presentation is a combination of different slides which I re-purposed. I included a reference of all the slides I used at the end of my presentation.
The presentation that will unable to create a clear cut concept regarding the Vessels the vascular system of the human body. It will let you know about the arteries, veins, capillaries how the exchange of nutrients and other substance takes place..and many more things related to the vessels of the body.
Model Attribute Check Company Auto PropertyCeline George
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Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
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This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
2. The Transport System in Humans
•All cells in our body need nutrients, oxygen and water.
Meanwhile carbon dioxide and other waste materials
produces by the cells must be removed.
•An internal transport system is needed to deliver
useful materials to the body cells and remove the
waste materials from them.
•The internal transport system is often called the
circulatory system because useful as well as waste
materials circulate the body.
4. •A circulatory system has four basic characteristics:
a. Circulating fluid – this circulating fluid is called
blood. The blood transports useful and waste
materials.
b. Pumping device – the pumping device is the
heart. Blood is moved through the body by
muscular contractions of the heart.
c. Blood vessels – a complex network of blood
vessels carries materials to the tissues and back to
the heart. There are three main types of blood
vessels, namely arteries, veins and capillaries.
d. Valves – valves are present in some blood vessels
to prevent backflow and ensure that blood flows
in one direction only.
5. •The human circulatory system is a double
circulatory system. This means that in each
complete circuit of the body, the blood must flow
through the heart twice.
•The human double circulatory system consists of:
a. The pulmonary circulation which transports
blood between the heart and the lungs and
a. The systematic circulation which transports
blood between the heart and all other parts of
the body.
6. •The advantage of having a double circulatory system is that it
increase the pressure of the blood and the rate of flow, thereby
speeding up the delivery of materials to the tissues.
The human double circulatory
system
7. Structure of the human heart
•An adult human heart is about the size of a clenches
fist.
•The heart lies in the chest between the two lungs.
•The heart is a muscular organ with walls made of
cardiac muscles.
•The coronary arteries supply nutrients and oxygen
wastes from the muscles.
•The heart is divided into four chambers. The two upper
chambers are called auricles and atria ( atrium) and the
two lower chambers are called ventricles.
8. •The septum divides the heart into the right and left
halves.
•The auricles have thinner walls than the ventricles.
When the auricles contract, blood is pushed into the
ventricles below.
•The left ventricle has a much thicker muscular wall
than the right ventricle. The right ventricle pumps blood
to the lungs , which lie next to the heart. The left
ventricle has to pump blood from the heart to the rest
of the body.
•The right atrium is connected to the right ventricle by
the tricuspid valve. The left atrium is connected to the
left ventricle by the bicuspid or mitral valve.
9. •Semilunar valves are
situated at the
entrances of the aorta
and the pulmonary
artery to prevent to
backflow of blood into
the ventricles.
• The chordae
tendineae prevent the
valves from turning
inside out when the
ventricles contract The structure of
the human heart
10. Function of the human heart
•The heart is made up of two pumps located
side by side.
•The right side of the heart pumps
deoxygenated blood it receives from the lungs
to the rest of the body. Oxygen is removed at
the tissues for respiration
11. Arteries
a. Arteries are blood vessels which carry blood
away from the heart.
b. Arteries deliver oxygenated blood except
pulmonary artery.
c. The walls of the arteries are much thicker and
stronger than those of veins because they
have to withstand the high pressure of blood
coming from the heart.
The blood vessels
13. Veins
a. Veins are blood vessels which carry blood
back to the heart.
b. Veins deliver deoxygenated blood except
pulmonary veins.
c. Veins have thinner walls than arteries
because blood pressure in the veins is much
lower than that in the arteries. Since the
blood in the veins may be moving against
gravity, the contain valves to present the
blood from flowing back.
15. Capillaries
a. Capillaries are tiny blood vessels which
connect arteries and veins. They have walls
which are only one cell thick.
b. Oxygen and nutrients move from the blood
through the capillary walls into the body cells.
At the same time carbon dioxide and other
waste products move from the cells into the
body.
17. Characterist
ics
Artery Vein Capillary
Cross section Circular Oval Circular
Size of wall Has thick
muscular wall
Has thin
muscular wall
Has very thin
walls, only
one cell- thick
Valves Absent
(except in
pulmonary
artery)
Present Absent
Differences of artery, vein and
capillary
18. Lumen Narrow Fairly wide Very
narrow
Colour Red Bluish – red Bluish – red
Oxygen
content
Oxygenated
blood (except
in pulmonary
artery)
Deoxygenated
blood (except
in pulmonary
veins)
Oxygenated
blood to the
tissues
Deoxygenated
blood from
the tissues
19. •Heart disease is one of the major cause of death in
Thailand.
•Factors that increase the risk of getting heart disease:
a. Heredity – the risk is increase if there is a family
history of heart disease.
b. Cholesterol and obesity – high cholesterol and
obesity are major heart disease risk factor.
c. Lack of exercise – low level of physical activity
increase the risk of getting heart disease.
d. Smoking – smoking damages blood vessels and leads
to heart disease. Smoking also decreases the amount
of oxygen that reaches the heart.
21. e. Stress – people who are stressed are more prone to
heart attacks.
f. Alcohol – excessive alcohol intake can elevate blood
pressure, thus making heart attacks more likely.
Stress Alcohol
22. a. Avoid high cholesterol foods. Eat more fruits and
vegetables.
b. Regular aerobic exercises help to keep body weight
down. Lower blood pressure and strengthen the
heart.
c. Lose weight to a desirable weight range and keep
within it with moderate eating and exercise.
d. Relax and get enough sleep.
e. Quit smoking.
f. Reduce alcohol consumption.
23. Eat more fruits Aerobics Lose weight
Get enough sleep Quit Smoking Reduce Alcohol