The Heart Flashcards
1
Q
Heart functions
A
- pumps blood
- made of cardiac muscle doesn’t get tired and controlled by the brain
- average beat is 70bpm at rest
2
Q
4 chambers
A
- Left and right side atria
- left and right side of the heart
3
Q
Deoxygenated blood
A
- Enters right atrium through vena cava
- carries blood from body
- passes through the tricuspid valve
- ## pumped out through pulmonary artery
4
Q
Oxygenated blood
A
- returns to the heart via the pulmonary vein
- enters left atrium
- moves through bicuspid valve
- blood is pumped out through the aorta
5
Q
Left ventricle
A
Wall is thicker because it has to pump blood so far
6
Q
Valves in heart
A
Stop blood from flowing backwards
7
Q
Oxygenated blood
A
Contains height levels of oxygen
8
Q
Deoxygenated blood
A
Contains low levels of oxygen
9
Q
Heart disease + heart attacks
A
Caused by a blockage of the arteries that supply the heart with blood
10
Q
Excersise
A
Heart beat increases to get the extra food and oxygen to the cells
11
Q
Fish and insects
A
Both have no lungs
