Exam 29: Blood Vessels

Which of the following vessels do not have the ability to constrict and dilate?

Pulmonary circulation is blood flow through the liver.

All blood returns to the heart by way of either the superior vena cava or the inferior vena cava.

Match each term with its corresponding description. -Middle layer of blood vessel, containing smooth muscle

All arteries of the systemic circulation branch from the:

Match each term with its corresponding description. -Blood flow from the heart to the body (not the lungs) and back to the heart

Arteriosclerosis means "chest pain."

Which statement is true of arteries?

The tunica media in veins is thinner than the tunica media in arteries.

What function does the foramen ovale serve in fetal circulation?

Precapillary sphincters are located in venules.

Arteriovenous shunts can redirect blood through the skin to help regulate heat loss.

Match each artery to its correct anatomical location. -Upper leg

Precapillary sphincters increase the flow of blood through a tissue when they relax.

The blood vessels that supply other blood vessels with blood are called the vasa vasorum.

Veins always carry deoxygenated blood.

All veins carry blood back to the heart.

A stenotic valve is a leaky valve.

Explain why the capillaries are the most important blood vessels in the circulatory system. Explain how their structure assists them in accomplishing their functions.

The descending aorta is composed of the thoracic and abdominal aortas.