Question

4. What is the role of diaphragm in respiration?
5. What is the function of haemoglobin present in red blood corpuscles?
6. What are blood groups?​

Answer 1

Answer:

4.When the diaphragm contracts and moves lower, the chest cavity enlarges, reducing the pressure inside the lungs. To equalize the pressure, air enters the lungs. When the diaphragm relaxes and moves back up, the elasticity of the lungs and chest wall pushes air out of the lungs.

5.Hemoglobin is contained in red blood cells, which efficiently carries oxygen from the lungs to the tissues of the body. Hemoglobin also helps in the transportation of carbon dioxide and hydrogen ions back to the lungs.

6.Blood groups are complex chemical systems found on the surface of blood cells.

Answer 2

Answer:

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