Question

Oxygen enters the blood in the lungs describe in points

Answer 1

1. The oxygen enters the bloodstream from the alveoli, tiny sacs in the lungs where gas exchange takes place .
2. The transfer of oxygen into the blood is through simple diffusion.
3.The oxygen-rich blood returns to the heart.
4. Oxygen-rich blood is then pumped through the aorta, the large artery that receives blood directly from the heart.
5. From the aorta, oxygen-rich blood travels to the smaller arteries and, finally, to the capillaries, the smallest type of blood vessel.The oxygen molecules move, by diffusion, out of the capillaries and into the body cells.
6.While oxygen moves from the capillaries and into body cells, carbon dioxide moves from the cells into the capillaries.
7.Carbon dioxide is brought, through the blood, back to the heart and then to the lungs. Then it is released into the air during exhalation.

Answer 2

The respiration is the process in which the oxygen enters the body and carbon dioxide is expelled out from the body.

Explanation:

• The air containing oxygen enters the body through nostrils which includes the air which trap the dust, pollen and other foreign particles.
• The air then enters the pharynx and then to larynx. The larynx prevents the backward movement of the air.
• The air then enters into the trachea which branches into tubes called as bronchi in the lungs.
• The bronchi are further branched into alveoli tubes.
• The alveoli are further branched into the capillaries.
• The capillaries are the blood vessels in which the exchange of gases takes place the carbon dioxide is removed by the lungs and the oxygen diffuses into the bloodstream.

Learn more about respiration:

Aerobic respiration and anaerobic respiration: https://brainly.in/question/10590649

Define  Pulmonary Respiration: https://brainly.in/question/1960368