Question

In humans, the exchange of gases occurs in the lungs. In which part of the lungs does it take place?​

Answer 1

Answer:

alveoli

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Answer 2

Alveoli

• The lungs' millions of alveoli and the capillaries that surround them are responsible for gas exchange.
• Inhaled oxygen travels from the alveoli to the blood in the capillaries, and carbon dioxide travels from the blood in the capillaries to the air in the alveoli, as illustrated in the diagram below.

• The respiratory system's main job is to take in oxygen and expel CO2.
• Inhaled oxygen reaches the alveoli after passing through the lungs.
• The cells that line the alveoli and adjacent capillaries are just one cell thick and in close proximity to one another.
• The air-blood barrier is around 1 micron thick (1/10000 of a centimetre, or 0.000039 inch).