Name: Kidney as the Body Filter
Uploaded: 2019-07-19
Duration: 4 min 4 s
Description: The kidney is the waste manager of our body. Let us look inside the kidney and understand how this wondrous filtration system works. Watch the video now.

Question

How is oxygen and carbon dioxide transported in human beings?

Accepted Answer

As oxygen-rich air enters the lungs, it reaches into the alveolar sac. The difference in the partial pressure of oxygen between the alveolar sac and the blood capillaries allows the diffusion of oxygen into the blood. Oxygen diffuses into the RBC and combines with haemoglobin to form oxyhaemoglobin. In the tissue capillaries, oxyhaemoglobin dissociates to release molecular oxygen due to low partial pressure of oxygen inside the tissue.

Carbon dioxide is more soluble in water than oxygen. It is mostly transported in the dissolved form in our blood. The carbon dioxide binds with the hemoglobin of RBC. When carbon dioxide binds to hemoglobin, a molecule called carbaminohemoglobin is formed. Carbon dioxide-rich blood is called deoxygenated blood. The partial pressure of carbon dioxide is more in the tissues; therefore, it is carried out through the blood capillaries. Since this partial pressure is more in the blood capillaries than the alveolar sac, the gas is released out from the blood capillaries into the air sac which is exhaled out from the nose.

How is oxygen and carbon dioxide transported in human beings?

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