Question

Describe the route taken by the blood from when it enters the heart in the
vena cava (the main vein) to where it leaves through the aorta (main artery).
b) Which of the blood vessels shown contains most oxygen?
c) What is the job of the valves between the two atria and the two ventricles?
d)
The heart receives its own blood supply through the coronary artery. Why is
this blood supply important?
e) A major cause of death amongst adults is coronary heart disease. Give two
causes of coronary heart disease and suggest how it might be avoided.
WORK SHEET
COLOUR THE DIAGRAM AND LABEL THE HUMAN HEART​

Answer 1

Answer:

Deoxygenated blood enters the right atrium through the vena cava. It then flows into the right ventricle. Then it is transported to the lungs via the pulmonary artery. From the lungs oxygenated blood is transported to the left atrium via the pulmonary vein. Then it flows into the left ventricle. Then , the oxygenated blood is carried to all the parts of the body via the aorta.

(c) The two valves present in between the two atria and the two ventricles prevent the backward flow of blood.