Body Transport System - Science Learning 7

What is situation of blood when it leaves heart?

Answer: When blood leaves the heart, it is under pressure. The ventricles push the blood with extra force because it has to be taken to the whole body.

What is an artery?

Answer: Artery is a blood vessel that carries oxygenated blood away from the heart. They contain thick walls to resist the high blood pressure that has been pumped by the ventricle of the heart.

Which vessel carries blood to lungs?

Answer: All the arteries carry blood away from the heart, and all the arteries carry oxygenated blood except for the pulmonary artery. Pulmonary artery is the vessel that carries blood from the heart to the lungs.

How does content diffuse into cells from blood?

Answer: When the arteries reach an organ, they are distributed into millions of tiny blood vessels known as capillaries. Capillaries help in the diffusion of food and oxygen into the cells and waste products out of the cells.

What are capillaries?

Answer: Arteries spread into tiny blood vessels known as capillaries. Capillaries are only one cell thick. Due to this reason, the red blood cells have to squeeze through them. For this reason, the red blood cells are biconcave and elastic.