describe respiratory system of humans with diagram
Answers
The air , passes through the nostrils.
The air that is passing is filtered by the fine hairs , which lines the passage.
Also , mucus helps in lining the passage , in the process involved.
From here , air passes through the throat and then into the lungs
In the throat , rings of cartilage are present , which ensures that the air passage does not collapse.
In the lungs , the passage is divided into very smaller tubes , that terminate into balloon like structures known as alveoli.
Alveoli is a surface that helps in the exchange of gases.
Extensive network of blood vessels is present in the walls of alveoli
When we breathe in , our ribs are lifted and diaphragm is flattened.
As a result , chest cavity becomes larger in size.
Therefore ,the air is sucked into the lungs , expanding the alveoli
Carbon dioxide are released into the alveoli by blood.
Oxygen in the alveolar air is taken by alveolar blood vessels , and is transported to all the cells in the body.
Respiration in humans takes place through the lungs. It is the largest organ of the human respiratory system. The air inhaled moves down the trachea into the lungs where oxygen is exchanged for carbon dioxide from the body tissues. Carbon dioxide is then exhaled out of the lungs through the mouth.
