Question

How is oxygen transported in large multicellular organisms like humans ​

Answer 1

Explanation:

Ans: In large multicellular organisms like humans, the body size is large, so the diffusion pressure alone cannot take care of oxygen delivery to all parts of the body. In multicellular organisms respiratory pigments take up oxygen from the air in the lungs and carry it to tissues which are deficient in oxygen before releasing it.in human beings, the respiratory pigment is hemoglobin which has a very high affinity for oxygen. This pigment is present in the red blood corpuscles.

Answer 2

Oxygen is transported in the large multicellular organisms like human in the following way -

• The human directly inhales gaseous oxygen directly from the external atmosphere, by the respiration process.
• The gaseous oxygen, which is inhaled by the human beings, later gets into the bloodstream by the diffusion process.
• In the blood of the human beings,the oxygen is all soaked up by the haemoglobin pigment.
• And, that oxygenated blood supplies oxygen to almost every cells and tissues in the human body.