Understanding Blood Vessels

What is the primary function of arteries in the circulatory system?

• To carry blood towards the heart

• To exchange nutrients and waste

• To carry blood away from the heart

• To store blood

Which layer of the artery is responsible for its elasticity and strength?

• Endothelial layer

• Tunica intima

• Tunica media

• Tunica externa

What is the role of arterioles in the circulatory system?

• To connect arteries to veins

• To transport oxygen directly to tissues

• To regulate blood flow through vasoconstriction and vasodilation

• To store blood

What is the function of precapillary sphincters?

• To increase blood pressure

• To regulate blood flow into capillaries

• To store blood

• To connect veins to arteries

What is the primary function of capillaries in the circulatory system?

• To regulate blood pressure

• To exchange gases, nutrients, and waste between blood and tissues

• To carry blood away from the heart

• To store blood

What type of tissue makes up the walls of capillaries?

• Simple squamous epithelial tissue

• Smooth muscle tissue

• Connective tissue

• Cartilage

How do veins differ from arteries in terms of structure?

• Veins have more smooth muscle

• Veins have thinner walls and larger lumens

• Veins have thicker walls

• Veins are more elastic

What is the function of valves in veins?

• To prevent backflow of blood

• To connect veins to arteries

• To store blood

• To increase blood pressure

What is the role of the hepatic portal system in the circulatory system?

• To regulate blood pressure

• To store blood

• To transport nutrients from the digestive tract to the liver

• To carry oxygenated blood to the liver

Why are arteries located deeper in the body compared to veins?

• To regulate body temperature

• To store more blood

• To allow for easier access during medical procedures

• To protect them from damage due to high pressure