The ventilation movements of the lungs in mammals are governed by________
A. Diaphragm
B. Costal muscles
C. Muscular walls of lungs
D. Both (a) and (b)
Answer:D
The ventilation movements of the lungs in mammals are governed by________
A. Diaphragm B. Costal muscles C. Muscular walls of lungs D. Both (a) and (b)