Cardiac Cycle-Diastole Vs. Systole

Question 1

Describe Diastole

Answer 1

-Period of relaxation
-Filling of the heart with blood

Question 2

Describe Systole

Answer 2

-Period of Contraction
-Emptying heart of blood

Question 3

First step of heart beat process

Answer 3

1. Heart is fully relaxed; atria begin to fill with blood; atrioventricular (AV) and semilunar (SL) valves are closed.

Question 4

Second step of heart beat process

Answer 4

2. Blood fills atria and pushes AV valves open, ventricles begin to fill.

Question 5

Third step of heart beat process

Answer 5

Atria contract, filling ventricles completely

Question 6

Fourth step of heart beat process

Answer 6

Ventricles begin to contract, forcing AV valves closed; SL valves remain closed.

Question 7

Fifth step of heartbeat process

Answer 7

5. Ventricles contract, fully forcing SL valves open and ejecting blood into arteries