respiratory system

The exchange of gases takes place within the respiratory system. This is quite simple right? But what happens in the respiratory system when you breath in oxygen?

The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body.

The respiratory system does this through breathing.

When we breathe, we inhale oxygen and exhale carbon dioxide.

This is known as the exchange of gases, and is the body’s means if getting oxygen to the blood.

Oxygen enters the respiratory system through the mouth and the nose.

It is the job of the diaphragm to help pump the carbon dioxide out of the lungs and pull the oxygen into the lungs.

The diaphragm is a sheet of muscles that lies across the bottom of the chest cavity.

Do you know:

Inhaled air contains 20 per cent oxygen, 0.03 per cent carbon dioxide and the rest is nitrogen.

Expired air contains 16 per cent oxygen and the carbon dioxide is increased over a hundredfold to 4 per cent.

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