Question

Explain the exchange of gases in tissues​

Answer 1

Here is Your answer ;

Tissue get oxygen throug heamoglobin of blood where it received from alveoli..then oxygen get dissolved in cells ,because of low oxygen concentration in them.the cells utilise oxygen to break down food as energy and produces co2 as byproduct.

Tissue get oxygen throug heamoglobin of blood where it received from alveoli..then oxygen get dissolved in cells ,because of low oxygen concentration in them.the cells utilise oxygen to break down food as energy and produces co2 as byproduct.then this co2 Is again carried back to alveoli through blood.the co2 get dissolved in alveoli because of low concentration of co2 in them.alveoli send co2 back to lungs .from there we exhale and get rid of it.this process will be vice versa.

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Answer 2

Exchange of gases in tissues

In the tissues, exchange of gases occurs between the blood and the tissue cells through tissue fluids that surround the tissue cells.

Blood that reaches the tissues has more partial pressure of O₂ (pO₂ = 95 mmHg), than that in the tissues (pO₂ = 40 mmHg). Similarly partial pressure of CO₂ is more in tissues (45 mmHg) than in the blood (40 mmHg).

Due to these differences in partial pressure of gases, O₂ from blood diffuses in the tissues and CO₂ from tissues diffuses into the blood. This exchange of gases occur simultaneously.

The venous blood goes to the right side of the heart that sends it to lungs via pulmonary artery for reoxygenation. The venous blood is 75% saturated at 40 mmHg of O$\sf{_2}$ and contains 14.4 mL of O₂/100 mL of blood.