3. Respiratory system
3. Respiratory system
The respiratory system helps to trap the atmospheric oxygen from the air and supply it to the body.
The respiratory system comprises the respiratory tract and diaphragm. The tract includes the nose, larynx, bronchi, and lungs.
The oxygen is absorbed into the blood from the lung alveoli and carried away. In the body, it helps to generate energy through the oxidation of glucosein the mitochondria.
Besides, the respiratory system helps in making sounds, excretion (alcohol), and also metabolism.