Question

What skeletal muscles and other processes drive inspiration and expiration during tidal breathing? Describe how these processes work during tidal breathing.

Answer 1

Tidal volume - It is the volume of air breathed in and out of lungs during quiet respiration.

Normal range of tidal volume is 500 ml.

The skeletal muscle helps in inspiration and expiration are -

For inspiration - It is a active process.

a. By ribs movements outwards and upwards.

b. By descent of diaphragm.

c. Accessory muscles of inspiration.

For expiration - it is a passive process.

a. Anterior abdominal wall muscles like transverse abdominus , internal and external Oblique.

b.internal intercoastal muscles.

c. Accessory muscles of expiration.

All the skeletal muscles play a vital role in expiration and inspiration of tidal breathing.