True or False

Respiratory system is composed of three main parts: the heart, the blood, and the blood vessel.

• True

• False

The main organ of the respiratory system is the lungs.

• True

• False

3. Breathing refers to the mechanical process wherein we take in oxygen and get rid of carbon dioxide

• True

• False

Life is not possible if breathing does not take place.

• False

• True

The heart is also called a living pump.

• False

• TRue

Heart is the main organ of the circulatory system.

• True

• False

Circulatory system is composed of group of organs and tissues that transport important materials to body cells and remove their waste.

• True

• False

Circulatory system is composed mainly of lungs, blood, and blood vessels.

• False

• True

Circulatory system is a transport system.

• True

• False

The three types of blood vessels are: arteries, veins, and nerves.

• True

• False