Body Transport System - Science Learning 3

Why blood moves around body?

Answer: Blood moves from the heart of the body to carry oxygen and dissolved food substances to the cells and waste products from cells to lungs and kidneys.

Why is heart useful?

Answer: A pump is needed to send blood around the body. This is the job of the heart, that is why heart is very important due to its strong muscular walls and pumping action.

What is inside heart?

Answer: The heart is divided into four different chambers, two top chambers are atria and two bottom chambers are ventricles. Atria are smaller than ventricles.

How are atria and ventricles separated?

Answer: Atria are separated from each other by strong muscular walls, as well as ventricles. Atria and ventricles are separated from each other by valves known as bicuspid and tricuspid valves.

Which blood vessel carries blood and where?

Answer: Veins are blood vessels that carry blood to the heart and arteries carry blood away from the heart. Capillaries are small vessels that connect arteries with veins.