The Circulatory System (P1)

Question 1

How does deoxygenated blood get to the heart and leave it again?

Answer 1

1. It returns through the vena cava
2. It enters the right atrium and a valve contracts to force it into the right ventricle
3. It leaves the heart through the pulmonary artery

Question 2

How does oxygenated blood get to the heart and leave it again?

Answer 2

1. it returns to the heart through the pulmonary vein
2. it enters the left atrium which contracts to force the blood into the left ventricle
3. the left ventricle forces blood into the aorta

Question 3

Faulty valves

Answer 3

They leak allowing blood to flow the wrong way when it contracts

Question 4

Heart arrhythmia

Answer 4

Irregular beating of the heart

Question 5

Cardio-vascular disease

Answer 5

Blockage of flow in the vessels that provide the blood, usually due to a high build up of fat or cholesterol