Cardiovascular System L1

Question 1

What are the three steps of cardiac cycle

Answer 1

Atria fill

Atria contract

Ventricles contract

Question 2

Atria fill

Answer 2

Atria fill with blood from vena cava and pulmonary vien

The atria ventricular valve then shuts

Pressure increases inside the atria

This forces the valves open

Blood now starts to enter the ventricles

Question 3

Atria contract

Answer 3

The atria contract to make sure all of the blood enters the ventricles

The semi lunar valves remain closed

Pressure increases

The semi lunar valves are forced open

Question 4

Ventricles contract

Answer 4

Force the blood around the body and lungs

Question 5

Pulmonary circulation

Answer 5

The transport of blood from the heart to the lungs and then back to the heart cycle.

Question 6

Systemic circulation

Answer 6

The transport of blood from the heart to the muscles and organs and back to the heart cycle.

Question 7

Pathway of blood

Answer 7

Vena cava
Right atrium
Right ventricle
Pulmonary arteries

Lungs

Pulmonary veins
Left atrium
Left ventricle
Aorta
Body

Question 8

Biggest chamber in the heart ?

Answer 8

Left ventricle

Question 9

Why does blood pass through the heart twice

Answer 9

Because of a double circulation system