Blood Flow and Circulatory System Flashcard

Front

What is the wall thickness of veins?

Back

Thin

Front

Why are veins considered low pressure vessels?

Back

They have larger lumens.

Front

What role does smooth muscle play in arterioles?

Back

It is slightly contracted to maintain vascular tone.

Front

What happens when the endothelium is damaged?

Back

It exposes collagen fibers, leading to clot formation.

Front

Which layer of the blood vessel wall is in direct contact with the blood?

Back

Tunica intima.

Front

What is the primary function of arteries?

Back

To carry oxygenated blood away from the heart.

Front

What is the function of capillaries in the circulatory system?

Back

To facilitate the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and tissues.

Front

What is the significance of the tunica media in blood vessels?

Back

It contains smooth muscle that regulates the diameter of the vessel and controls blood flow.

Front

How do valves in veins assist in blood flow?

Back

They prevent backflow of blood, ensuring it moves towards the heart.

Front

What is the role of the heart in the circulatory system?

Back

To pump blood throughout the body, supplying oxygen and nutrients while removing waste.