Anatomy of Blood Vessels

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What is the function of arterioles in the circulatory system?

To link arteries and veins
To control blood pressure and blood distribution (correct)
To carry blood away from the heart
To exchange gases, nutrients, and waste products between tissues and blood

Which vessel has walls with three tunics, but thinner walls than arteries?

Capillaries
Venules
Arterioles
Veins (correct)

What is the primary role of the pulmonary circuit in the circulatory system?

Controlling blood pressure and blood distribution
Replenishing the blood's supply of oxygen (correct)
Exchanging gases, nutrients, and waste products between tissues and blood
Carrying blood away from the heart

Which vessel is responsible for the exchange of gases, nutrients, and waste products between tissues and blood?

Capillaries (B) Signup and view all the answers

Why do capillaries have thin walls?

To allow for exchanges between blood and tissues (C) Signup and view all the answers

What is the function of anastomoses?

Communication between two vessels (C) Signup and view all the answers

What is the function of the pulmonary veins?

Carry blood high in oxygen back to the heart (B) Signup and view all the answers

Which part of the aorta supplies branches to the chest wall, esophagus, and bronchi?

Thoracic aorta (B) Signup and view all the answers

What is the primary function of the systemic arteries?

Supply oxygenated blood to tissues (B) Signup and view all the answers

Why do arteries have thick walls?

To withstand high pressure (C) Signup and view all the answers

What does the middle tunic of the vessels consist of?

Smooth muscle (B) Signup and view all the answers

Which vessel supplies blood to the arm and hand, and branches into the vertebral artery and axillary artery?

Subclavian artery (A) Signup and view all the answers

What is the primary function of the thoracic aorta?

Supply branches to the chest wall, esophagus, and bronchi (C) Signup and view all the answers

Why do capillaries have thin walls according to the text?

To allow for exchanges between blood and body cells (D) Signup and view all the answers

What is the function of anastomoses as described in the text?

To provide multiple routes for blood supply to vital organs (C) Signup and view all the answers

What is the function of venules in the circulatory system?

Link capillaries and veins (D) Signup and view all the answers

How do the walls of venules at the venous end compare to those at the capillary end?

Thicker walls at the venous end (B) Signup and view all the answers

Which vessel is responsible for carrying blood to the heart?

Veins (A) Signup and view all the answers

What is the primary role of arterioles in the circulatory system?

Control blood pressure and blood distribution (B) Signup and view all the answers

What is the structure of capillaries that sets them apart from arteries and veins?

Single layer; Endothelium only (A) Signup and view all the answers