Human Anatomy: Blood Vessels Structure

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What is the main function of arterioles?

To carry blood away from the heart
To exchange molecules between blood and tissue fluid
To regulate blood flow to tissues (correct)
To carry blood towards the heart

What is the unique feature of muscular arteries?

Thin tunica media
High elastin content
Thick tunica intima
Internal and external elastic laminae (correct)

What is the function of precapillary sphincters in capillary beds?

To regulate blood pressure
To decrease blood flow to tissues
To regulate the flow of blood to tissues (correct)
To increase blood flow to tissues

What is the main function of capillaries?

To exchange molecules between blood and tissue fluid (C) Signup and view all the answers

What is the composition of the tunica intima?

Simple squamous epithelium (C) Signup and view all the answers

What is the function of vasoconstriction and vasodilation?

To control smooth muscle contraction and relaxation (A) Signup and view all the answers

What is the role of sphincters in capillary beds?

To bypass true capillaries and flow through the metarteriole (A) Signup and view all the answers

What is the function of tight junctions in capillaries?

To hold endothelial cells together (C) Signup and view all the answers

What type of capillary is least permeable and most common?

Continuous capillary (A) Signup and view all the answers

What is the function of pinocytotic vesicles in capillaries?

To facilitate the transport of molecules across the capillary wall (A) Signup and view all the answers

Where are fenestrated capillaries typically found?

In the kidney and small intestine (C) Signup and view all the answers

What is the primary function of valves in some veins, particularly in limbs?

To counteract low venous pressure (D) Signup and view all the answers

What is the name of the arteries that nourish the outer region of large vessels?

Vasa vasorum (C) Signup and view all the answers

Which pulmonary artery branches into the right and left pulmonary arteries?

Pulmonary trunk (D) Signup and view all the answers

What is the largest artery in the body?

Aorta (B) Signup and view all the answers

What is the name of the artery that supplies oxygenated blood to the head and neck?

Internal carotid artery (B) Signup and view all the answers

What is the function of the skeletal muscle pump in veins?

To counteract low venous pressure (B) Signup and view all the answers

What is the name of the artery that supplies oxygenated blood to the brain?

Internal carotid artery (A) Signup and view all the answers

What is the name of the vein that carries oxygenated blood from the lungs to the left atrium?

Pulmonary vein (C) Signup and view all the answers

What is the name of the artery that supplies oxygenated blood to the abdominal organs?

Celiac trunk (C) Signup and view all the answers

What is the name of the artery that supplies oxygenated blood to the upper limb?

Subclavian artery (C) Signup and view all the answers

Which artery is responsible for supplying the ascending colon?

Superior mesenteric artery (D) Signup and view all the answers

Which vein drains the liver and empties into the inferior vena cava?

Hepatic vein (D) Signup and view all the answers

What is the function of the hepatic portal system?

Pick up digested nutrients and deliver them to the liver for processing (B) Signup and view all the answers

Which artery is responsible for supplying the sigmoid colon?

Inferior mesenteric artery (D) Signup and view all the answers

What is the name of the vein that drains the small intestine?

Superior mesenteric vein (B) Signup and view all the answers

Which artery is responsible for supplying the head and neck?

Internal carotid artery (C) Signup and view all the answers

What is the name of the vein that drains the brain?

Dural sinus (C) Signup and view all the answers

Which artery is responsible for supplying the lower limb?

External iliac artery (C) Signup and view all the answers

What is the name of the vein that drains the liver and empties into the inferior vena cava?

Hepatic vein (C) Signup and view all the answers

Which vein drains the superficial tissues of the lower limb?

Great saphenous vein (B) Signup and view all the answers