Question

Which of the following statement(s) is (are) true about human respiratory
system?
1.
When we breathe, we lift our ribs and flatten our diaphragm
2.Trachea is covered by epiglottis
3.Lungs always contain a residual volume of aix
4,The air passing through the nostrils is filtered by Chia.
a) I and II only
c)I, II and III only
b) ll and III only
d)I, III and IV only​

Answer 1

Answer:

d

Explanation:

understanding it may be good

Answer 2

Answer:

Answer is D no. please norte