circulatory system Flashcards
1
Q
what are the phases of the circulatory system
A
- Diastole
- Atrial systole
- Ventricular systole
2
Q
describe phase 1 of the cardiac cycle: DIASTOLE
A
- the filling phase as the heart muscles relax
- the atria fills with blood and the ventricles will start to receive blood as the valves open
3
Q
describe phase 2 of the cardiac cycle: ATRIAL SYSTOLE
A
- contraction of the atria
- forces remaining blood into the ventricles and atrioventricular valves close the prevent backflow
4
Q
describe phase 3 of the cardiac cycle: VENTRICULAR SYSTOLE
A
- contracts and forces blood into the arteries under high pressure
- atria and ventricles contract simultaneously on both sides
5
Q
how long does distole last?
A
0.4s
6
Q
hoe long does atriole systole last
A
0.1s
7
Q
how long does the cardiac cycle last for
A
0.8s
8
Q
how long does ventricular systole last
A
0.3s
9
Q
how many times does blood pass through the heart in 1 complete circuit
A
twice this is known as double circulation
