Q3.Correct the following statements:
a)The primary passage for air to enter the body is through the mouth.
b)Nostrils move up and down during the process of breathing.
c)Nostrils have hair like structures called villi.
Q4. THINK LINE: Vinay always sleeps with his face completely covered by blanket. Do you think he is taking care of his body or harming it.? Explain?