MENU

Chapter 11 Transportation in Animals and Plants Solutions

Question - 11 : -
Describe the function of the heart.

Answer - 11 : -

The human heart is divided into four chambers. The upper two chambers are called right and left atrium and the lower two chambers are called the right and left ventricles. Right atrium receives carbon dioxide-rich blood from the body. Blood from right atrium enters the right ventricle, which contracts and pumps the blood to the lungs.
Flow of blood in the human heart

On the other hand, oxygen rich blood from the lungs returns to the left atrium. From the left atrium, blood enters left ventricle. Left ventricle contracts and pumps the blood to all parts of the body.

Hence, the rhythmic contraction and expansion of various chambers of the heart maintains the transport of oxygen to all parts of the body.

Question - 12 : -
Why is it necessary to excrete waste products?

Answer - 12 : -

All cells of our body produce waste products. These waste products are toxic to the body and therefore need to be excreted out. This process of removing waste products produced in the cells of living organisms is called excretion.

Question - 13 : -
Draw a diagram of the human excretory system and label the various parts.

Answer - 13 : -

Human excretory system

Free - Previous Years Question Papers
Any questions? Ask us!
×