Physiology of Cardiovascular System - Part II
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Questions and Answers

What is the main function of the heart in the circulatory system?

  • To allow diffusion of gases between tissue cells and blood
  • To continuously circulate blood by rhythmic pumping (correct)
  • To receive and pump blood from arteries to veins
  • To distribute blood from the tissues to the heart

Which component of the circulatory system acts as an interchanges system for diffusion of gases, substances, and fluids between tissue cells and blood?

  • Capillaries (correct)
  • Arteries & arterioles
  • Venules & veins
  • Blood vessels

What is the function of venules and veins in the circulatory system?

  • To distribute blood from the heart to the tissues of the body
  • To continuously circulate blood by rhythmic pumping
  • To allow diffusion of gases between tissue cells and blood
  • To carry the blood from the tissues to the heart (correct)

What are the basic components of the circulatory system?

<p>Heart, blood vessels, blood (B)</p> Signup and view all the answers

What is the function of arteries and arterioles in the circulatory system?

<p>To distribute blood from the heart to the tissues of the body (B)</p> Signup and view all the answers

What is the main function of blood in the circulatory system?

<p>To transport materials such as O2, CO2, nutrients, wastes (B)</p> Signup and view all the answers

What is the main function of the fibrous pericardium?

<p>Preventing overfilling of the heart with blood (D)</p> Signup and view all the answers

Which layer of the heart wall is responsible for contractions of the heart chambers?

<p>Myocardium (B)</p> Signup and view all the answers

What is the function of the atrioventricular rings in the heart?

<p>Providing attachment to most myocardial fibers &amp; AV valves (B)</p> Signup and view all the answers

What separates the left and right ventricles in the heart?

<p>Interventricular septum (A)</p> Signup and view all the answers

Where is the visceral pericardium located?

<p>Surrounding the heart surface (B)</p> Signup and view all the answers

What is the location of the fibrous pericardium in relation to the serous pericardium?

<p>Outer layer (A)</p> Signup and view all the answers

What is the main function of papillary muscles in the heart?

<p>Projecting from the walls of ventricles into their cavities (A)</p> Signup and view all the answers

Flashcards

What is the main function of the heart?

The heart is the central pump responsible for continuously circulating blood throughout the circulatory system.

What is the function of capillaries?

Capillaries are tiny blood vessels that act as exchange points where gases, nutrients, and waste products move between blood and tissue cells.

What do venules and veins do?

Venules and veins carry deoxygenated blood back to the heart from the tissues.

What are the main components of the circulatory system?

The circulatory system is made up of the heart, blood vessels, and blood.

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What do arteries and arterioles do?

Arteries and arterioles distribute oxygenated blood from the heart to the body's tissues.

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What is the main function of blood?

Blood carries essential substances, such as oxygen, carbon dioxide, nutrients, and waste, throughout the body.

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What is the function of the fibrous pericardium?

The fibrous pericardium is a tough outer sac that protects the heart and prevents it from overfilling with blood.

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Which layer of the heart contracts?

The myocardium, the middle layer of the heart wall, is responsible for the contractions that pump blood.

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What is the function of the atrioventricular rings?

The atrioventricular rings act as anchors for the myocardial fibers and the valves that regulate blood flow between the atria and ventricles.

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What separates the left and right ventricles?

The interventricular septum is a thick wall that separates the left and right ventricles of the heart, preventing blood mixing.

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Where is the visceral pericardium located?

The visceral pericardium, also known as the epicardium, is the innermost layer of the pericardium and directly surrounds the heart's surface.

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Where is the fibrous pericardium in relation to the serous pericardium?

The fibrous pericardium is located outside the serous pericardium, forming an outer protective layer.

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What is the main function of papillary muscles?

Papillary muscles are projections within the ventricles that attach to the chordae tendineae, which in turn are connected to the valves, preventing them from prolapsing during ventricular contraction.

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