Question

Explain the exchange of gases briefly with diagram

Answer 1

The function of the respiratory system is to exchange two gases: oxygen and carbon dioxide. The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them.

Answer 2

HEY MISS CLAIR

HERE IS UR ANSWER

The process of gas exchange in the human body is also known as the process of inspiration and expiration.

Inspiration is when you are breathing in. The diaphragm moves downward, allowing for the lungs to expand. The lungs expand to be filled with air and the air pressure in the alveoli (the final point of inspiration as air passed through the lungs) becomes less than atmospheric pressure. Because the atmospheric pressure within the alveoli is less, air is forced in by the higher atmospheric pressure on the outside of the body.

Expiration is when you are breathing out. The diaphragm relaxes and moves back up, the lungs contract, and the air pressure in the alveoli is now more than the pressure externally which causes the air to be forced out of the lungs. When the air moves out of the lungs you breath out in what is known as an exhalation.