What is cell differentiation?

State different types of tissues.

Mention the function of ‘Alveoli’?

Name the processes by which air enters and comes out of our lungs?

Define Metabolism?

Dr. Usha is a pulmonologist (Doctor for respiratory diseases). One day, a school student named Arjun, met her with respiratory problems. After diagnosis, the doctor advised him to go playground daily and play football or basketball. She also advised to do pranayamam in the morning.
a) Why did the doctor advised him to go to the playground?
b) What is the use of pranayamam?

Explain why are you not able to breathe normally when you are in closed and crowded places?

Define cell.

List out the organs which help to maintain homeostasis?

Define Osmoregulation.