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Updated: May 6, 2025
=Parts of the Blood.= Blood consists of a clear, watery part called plasma and many little bodies named cells. The liquid found in a blister is the clear part of the blood. The cells which float in the watery part are so little and so close together that more than a million are in each drop of blood.
The contracting of the fibrin also squeezes out the serum. This liquid contains all the constituents of the plasma except the fibrinogen. These by contracting draw the corpuscles together and form the clot.
They had the same body chemistry in fact, you couldn't tell Lhari blood from human, even under a microscope. And in the terrible Orion Spaceport wreck sixty years ago, doctors had found that blood plasma from humans could be used for wounded Lhari, and vice versa, though it wasn't safe to transfuse whole blood. But then, even among humans there were five blood types.
When we say this fluid is composed of certain anatomical elements, as the plasma, red corpuscles, leucocytes and granules, we go a step further in the problem of vitality.
There was an acute parenchymatous nephritis with focal plasma cell infiltrations suggesting acute interstitial nephritis. This case appears to have shown one of the most nearly normal brains in the whole Danvers series. Patient was variously designated, as "dementia" and as "acute confusional insanity." Father also insane.
Partly on account of the pressure upon the blood and partly on account of the natural tendency of liquids to pass through animal membranes, a considerable portion of the plasma penetrates the thin walls and enters the spaces occupied by the lymph. The cells themselves also help to form the lymph, since the water and wastes leaving the cells add to its bulk.
There was only plasma for some two hundred injections, but that should yield sufficient proof. Once salvation was offered, there should be no trouble convincing the people that blood donations from their children were worthwhile. Later, when the last of the plasma had been used, they could finally relax. Chris slipped off her smock and dropped onto the cot. A tired smile came onto her lips.
The red corpuscles, whose changes have already been noted, appear to be the most enduring constituents of the blood. The plasma is the portion that changes most rapidly. Yet in spite of these changes the quantity and character of the blood remain practically constant. This is because there is a balancing of the forces that bring about the changes.
The free oxygen is transported from the lungs to the cells by means of the hemoglobin of the red corpuscles, while the combined oxygen in carbon dioxide and other compounds from the cells is carried mainly by the plasma. The limited supply of free oxygen in the body at any time makes necessary its continuous introduction into the body. *Exercises.*—1. Describe the properties of oxygen.
The only representative of the carbohydrates in the plasma is dextrose. This is a variety of sugar, being derived from starch and the different sugars that are eaten. The fat in the plasma is in minute quantities and appears as fine droplets—the form in which it is found in milk.
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