What is breathing? Explain mechanism of Breathing in human beings in 50-60 words
Answers
Answer:
The action of breathing in and out is due to changes in pressure within the chest (thorax). This action is also known as external respiration and is created by the muscles of the chest and the diaphragm changing the size of the chest cavity (and air pressure). Here we explain the mechanics of breathing and how breathing is regulated at rest and during exercise. Mechanics of breathing When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity. The diaphragm flattens and moves downwards and the intercostal muscles move the rib cage upwards and out. This increase in size decreases the internal air pressure and so air from the outside (at a now higher pressure than inside the thorax) rushes into the lungs to equalise the pressures. When we exhale the diaphragm and intercostal muscles relax and return to their resting positions. This reduces the size of the thoracic cavity, thereby increasing the pressure and forcing air out of the lungs.
Explanation:
When we take in oxygen it goes through nasal cavity and through trechea from that it goes to bronchioles from that it goes to alveoli through which exchange of gases takes place and our blood gets oxygenated and carbon dioxide will be released out of the body in the same manner