Question

Short note on inhalation

Answer 1

Inhalation:

1. The process of taking in air, rich in oxygen is called inhalation.​
2. It is also known as inspiration.
3. When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward.
4. This increases the space in your chest cavity, into which your lungs expand.
5. The intercostal muscles between your ribs also help enlarge the chest cavity.
6. They contract to pull your rib cage both upward and outward when you inhale.
7. As your lungs expand, the air pressure inside the lungs decreases and the air is sucked in through your nose or mouth.
8. The air then travels down your windpipe and into your lungs. After passing through your bronchial tubes, the air finally reaches and enters the alveoli (air sacs).

Diagram of mechanism of inhalation:

Figure : Inspiration