Question

From which structures do oxygen molecules move from the lungs to the blood?.

Answer 1

Oxygen molecules move from the alveoli to the blood in the capillaries through simple diffusion.

Step-by-step explanation:

Oxygen molecules move from the alveoli, tiny sacs in the lungs where gas exchange takes place. The walls of the alveoli are very thin and allow gases to pass through them. Oxygen moves from the alveoli to the blood in the capillaries that surround the alveoli. This movement occurs by simple diffusion, where oxygen moves from an area of high concentration in the alveoli to an area of low concentration in the blood.

Once the oxygen molecules have entered the blood, they are transported to the body cells. Carbon dioxide, produced by the body cells, moves from the cells into the capillaries and is carried back to the heart and then to the lungs to be released during exhalation.

Answer 2

Alveoli are tiny sacs in the lungs surrounded by capillaries ⭐️