Cardiovascular System: Blood Vessels and Circulatory Routes

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Which vessels carry blood towards the heart?

Venules

Arteries (correct)

Arterioles

Veins

What is the function of arterioles?

To control blood flow into capillaries (correct)

To connect capillaries to veins

To allow exchange of gases and nutrients

To carry blood towards the heart

Which type of tissue forms the inner layer (Tunica Interna) of a blood vessel?

Elastic fiber tissue

Smooth muscle tissue

Simple squamous endothelium tissue (correct)

Striated muscle tissue

What is the thickest layer in the wall of a blood vessel?

Tunica Media Signup and view all the answers

What is the main function of veins in the cardiovascular system?

To carry blood away from the heart Signup and view all the answers

Which vessels connect capillaries to veins?

Venules Signup and view all the answers

What is the function of capillaries in the circulatory system?

To allow exchange of gases and nutrients Signup and view all the answers

Which component of the Tunica Media is responsible for the elasticity of blood vessels?

Smooth muscle Signup and view all the answers

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

To control blood flow into capillaries Signup and view all the answers

What tissues form the inner layer (Tunica Interna) of a blood vessel?

Simple squamous endothelium tissue Signup and view all the answers

What is the role of smooth muscle cells in blood vessels?

To regulate the diameter of the lumen Signup and view all the answers

What happens when smooth muscle in the blood vessel contracts?

Vasoconstriction occurs Signup and view all the answers

What is the function of the elastic fibers within the tunica media of blood vessels?

To allow for expansion under pressure Signup and view all the answers

What is the main role of arteries in the circulatory system?

To carry oxygenated blood away from the heart to other organs Signup and view all the answers

What is a characteristic of all arteries?

They carry deoxygenated blood (except pulmonary arteries) Signup and view all the answers

What is found in the thickest layer of artery walls?

Smooth muscle cells and elastic tissue Signup and view all the answers

In what situation would smooth muscle in a small artery or arteriole contract?

In response to increased sympathetic stimulation Signup and view all the answers

What is the function of the tunica interna in artery walls?

To allow for expansion under pressure Signup and view all the answers

What happens when elastic arteries stretch and recoil under pressure?

Vasodilation occurs Signup and view all the answers

What is a distinguishing feature of arteries compared to veins?

Thin walls that can expand under pressure Signup and view all the answers

What causes vasoconstriction in blood vessels?

Increase in sympathetic stimulation Signup and view all the answers

What type of blood do all arteries carry?

Oxygenated blood Signup and view all the answers