Respiratory system

 Respiratory system is a group of organ involved in inhalation and exhalation. By inhalation lung receives oxygen and by exhalation lung releases Carbon dioxide.

It is also called pulmonary system.

The organs of respiratory system is as bellow,

Nose： Hollow organ at first that receives air.

Pharynx： Nose passess air into pharynx.

Larynx： Larynx is the next part of pharynx. It produces sound.

Trachea： Trachea is a wind pipe next to larynx.

Bronchus： Trachea divided into two part. these two parts are divided into bronchus.

Broncheole

Lung： Lung is the largest part of the respiratory system. when it expand, it receives air and when it shirnk it expels air from lung.

Alveoli： Alveoli is a air sacs in lung. It attached with capillaries and exchanges air between lung and blood stream.