Theoretical medicine

[Evgenie And.]

Why concentration in a blood of advanced forms of mammals does not exceed 150 units? Than this top threshold is caused? I ask to give the developed or unwrapped answer or the link to the given answer.
Zarannee it is grateful.
Evgenie.

[Rastorguev D.V.]

Hello, Evgenie!
Such law takes place concerning an average haemoglobin content in a blood at the healthy adult mammals living on a sea level. She is caused by similarity sotava bloods, structures or frames of a hemoglobin and erythrocytes, physical and chemical mechanisms of transport of oxygen in a blood and tissues.
On my poor or scanty knowledge, at such concentration of a hemoglobin its or his maximal saturation by oxygen in an arterial blood in lungs (the order of 95 %) in conditions of atmospheric pressure nearby 1 ATM is reached or achieved. It is caused by the certain solubility of oxygen in a blood (partial pressure of oxygen) at the given pressure, and also svojsvami a hemoglobin on linkage of oxygen.
The greater haemoglobin content is inexpedient, since its or his insufficient saturation will take place, in communications or connections than a nonsaturated hemoglobin will not carry out the direct physiological function - carry of oxygen from lungs in a tissue.
Details should be specified at experts: physiologists and biochemists.