What are the components of the transport system in human beings ? What are the functions of these components?
Answers
Components of transport system are:
1. Heart
2.Blood
3.Blood vessels
functions-
1. Heart pumps the blood. It provides transport of oxygeneted blood throughout the body.
2. Blood carries aal the dissolved nutrients, waste and many other things.
3. Blood vesels are of 2 types:
a) Arteries carry oxygeneted blood from heart to other parts of body.
b) Viens carry deoxygeneted blood from body organs to heart.
In human beings, for the transport of various substances, a well-developed circulatory system is present. Main components of circulatory system are Heart, blood vessels and blood.
Heart:- It pumps the blood and circulate the blood in the whole body continuously.
Blood vessels:- Arteries are thick blood vessels which carry oxygenated blood from the heart to all the parts of the body.
Veins are thin-walled blood vessels which carry deoxygenated blood from all the parts of the body back to the heart.
Capillaries are thin and narrow blood vessels in which exchange of material between the blood and surrounding cells takes place.
Blood:- It acts as a connective tissue which transport food, oxygen waste materials, hormones, etc. from one part of the body to another.