Question

Explain Mechanism of Breathing​

Answer 1

When you breathe in, or inhale, your diaphragm contracts and moves downward.

This increases the space in your chest cavity, and your lungs expand into it.

The muscles between your ribs also help enlarge the chest cavity.

They contract to pull your rib cage both upward and outward when you inhale.

Hope it helps :)

Answer 2

Breathing is a means of maximizing the process of gaseous exchange .The movement of a air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere .Breathing involves two stages such as inspiration and expiration .

• Inspiration can occur if the pressure within the lungs is less than the atmospheric pressure like there is a negative pressure in the lungs with respect to atmospheric pressure .
• Similarly expiration takes place when the intrapulmonary pressure is higher than the atmospheric pressure the muscular diaphragmatic specialises set of muscle the external and internal intercostal muscles help in generating such gradients .

Inspiration:-

Intake of atmospheric air into the lungs is called Inspiration.

It is an active process as it take place by contraction of the muscles of the diaphragm and the extend inter distance muscles which extend in between the ribs.

The contraction of the diaphragm in trees are the volume of the thoracic chamber in the anterior posterior access the contraction of external intercostal muscles lips of the ribs and sternum causing an increase in the volume of the thoracic chamber in the dorsal ventral axis.

The overall increase in the thoracic volume causes a similar increase in the pulmonary volume .

An increase in the pulmonary volume decreases the intrapulmonary pressure to less than that of atmosphere which force is the air from the outside to move into the lungs .

Expiration:-

Release alveolar air to the exterior is called Expiration.

It is a passive process .

Relaxation after taiyar Adam and the external intercostal muscles returns the diaphragm and sternum to their normal positions and reduces the thoracic volume and thereby the pulmonary volume .

This leads to an increase in the intrapulmonary pressure to slightly above that of atmospheric river crossing the expulsion of air from the lungs .

More Info:-

• The contraction of the internal intercostal muscles and the lateral abdominal muscles help in forced expiration.
• We have the ability to increase the strength of inspiration and expiration with the help of additional muscles in the abdomen .
• On an average a healthy human breaths 12-16 times /minutes.
• The volume of the Year involved in breathing women can be estimated by using a spirometer. which helps in clinical assessment of the pulmonary functions.