draw the respiratory system in human beings and describe the mechanism of breathing
explain human digestive system with the help of a diagram...
1. The process of breathing involves taking in oxygen-rich air and giving out carbon dioxide-rich air. This entire process occurs through the action of the various organs of the respiratory system.
We all know that we take in air through our nostrils, and when we breathe in, air passes through our nostrils into the nasal cavity.
A
ir then reaches the lungs, which are located in the chest cavity. The actual mechanism of breathing involves the movement of the rib cage and thediaphragm, which are located around and at the base of the chest cavity respectively.
The breathing involves two processes: Inhalation and exhalation.
During inhalation, the diaphragm moves down and the ribs move upwards and outwards, thereby increasing the space in the chest cavity. This leads to the movement of air inside the lungs.
During exhalation, the diaphragm moves to its former position and the ribs move downwards and inwards, thereby reducing the size of the chest cavity. This leads to the movement of air out of the lungs.
2. Kindly refer to the following link for the answer of your second question.