1The Heart Consists of Two Muscular Pumps
Right and left sides of heart
2What does the right side of the heart do?
Pumps blood to the lungs
3What does the left side of the heart do?
Pumps blood to the body
4What does the diagram of the heart show?
Internal structure of the heart
5What type of blood does the right side of the heart handle?
Deoxygenated blood
6What type of blood does the left side of the heart handle?
Oxygenated blood
7How are the left and right sides of the heart labeled in diagrams?
Reversed left and right sides
8You Need to Know What the Different Parts of the Heart Do
Adapted to pump blood efficiently
9What is unique about the left ventricle walls?
Thicker, more muscular
10Why does the left ventricle need to be strong?
Pump blood powerfully to the body
11Why are the right ventricle walls thinner?
Pumps blood only to the lungs
12What pushes blood out of the heart?
Thicker ventricular walls
13What is the role of atrioventricular (AV) valves?
Stop blood flowing back to atria
14What do semilunar (SL) valves do?
Stop blood flowing back from arteries
15How do the valves ensure one-way flow?
Open/close based on pressure
16What happens when pressure is higher behind a valve?
Valve opens
17What happens when pressure is higher in front of a valve?
Valve closes
18The Cardiac Cycle Pumps Blood Around the Body
Continuous contraction and relaxation
19What is the purpose of the cardiac cycle?
Keeps blood circulating
20What happens during "Atria contract"?
Blood forced into ventricles
21What happens during "Ventricles contract"?
Blood forced into arteries
22What happens during "Atria relax"?
Blood flows into atria
23What happens when ventricles relax?
Pressure in arteries rises
24What does high artery pressure do?
Closes SL valves
25What begins as atria refill?
A new cardiac cycle