Cardiovascular+System+PK


 * Cardiovascular System**

(1) What are the two parts of the cardiovascular system? - The two parts are the heart and the blood vessels.

(2) What are the functions of the cardiovascular system? - The purpose of the cardiovascular system is to service the cells with oxygen.

(3) What are the types of blood vessels? - Types of blood vessels are capillaries, arteries and veins.

(4) What is the structure and function of these vessels? - Arteries have three layers which are endothelium, smooth muscles and elastic tissue and connective tissues. The arteries pump blood away from the heart. The capillaries branch are very narrow and composed of endothelium with a basement membrane. The capillaries send blood to all cells in the body. Veins are similar to the arteries (3 layers) but veins have less smooth muscle and less connective tissue. Veins also have valves whoch allow blood to only flow towards the heart. The function of the veins are to send blood back to the heart.



(5) Why is the heart a double pump? - The heart is a double pump because it pumps blood to the lungs and throughout the body.

(6) What causes the "lub" and the "dup" of the heart sounds? - The "lub" is the Av valve slamming shut and the "dub" is the is when the semilunar valve closing.

(7) What keeps the heart beat regular? - The internal conduction system keeps the heart beating regularly.

(8) What does the pulse rate of a person indicate? - The pulse rate dictates the heart rate.

(9) What accounts for blood flow in the arteries? - Blood pressure accounts for the blood flow in arteries.

- The skeletal pump and the respiratory pump** *
 * (10) What accounts for blood flow in the veins?