Transportation of materials

The _____ acts as the pump and brings about circulation of blood within the blood vessels.

• Heart

• Kidney

• Liver

• Intestine

Human Circulatory system consists of-

• Blood

• Blood vessels

• Sunlight

• Heart

The heart starts beating long before the time of birth and goes on beating till death. True or False.

What is a stethoscope?

• A stethoscope is a transport system that moves substances throughout our body with the help of blood.

• Stethoscope is an instrument which is used to observe heart beat.

• Stethoscope is the regular rhythmic contraction and relaxation of the heart.

Oxygenated blood is received from the _____

• Kidney

• Lungs

• Muscles

• Ribcage