inspiration, the diaphragm and external intercostal muscles contract,

1.	inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs
Answer» This is BIOLOGY not geography Explanation: FIRST if all this is biology not geography...... and for ANS google it ,dear

inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs

Answer»

This is BIOLOGY not geography

Explanation:

FIRST if all this is biology not geography......

and

for ANS

google it ,dear