Blood Vessel Structure and Function Quiz

Arteries carry blood away from the heart and are oxygen-rich, except for pulmonary circulation and umbilical vessels of the fetus. Capillaries directly serve cellular needs by having direct contact with tissue cells. Veins carry blood toward the heart and are oxygen-poor, except for pulmonary circulation and umbilical vessels of the fetus.

Lymphatic vessels form a non-closed looped system that starts at the blood capillaries and ends at the major cardiovascular veins. They carry lymph, which is not exactly blood.

The walls of all vessels, except capillaries, have three layers. These layers are the tunica intima, tunica media, and tunica externa.

<p>The lumen refers to the central blood-containing space within a blood vessel.</p> Signup and view all the answers

<p>Capillaries have direct contact with tissue cells and directly serve their cellular needs.</p> Signup and view all the answers