. Adventures with animals and plants. Biology. 2 12 How a Cojnplex Ani?nal Uses Food unit iv. Fig. 213 This pJ:)otograph was taken while the man was donating blood for the third time at a Red Cross Center during World War 11. How was the blood used? Is there still a need for blood dona- tions? work of a great physiologist, Karl Land- steiner, who died in 1943. Also it was discovered recently that there is a substance in the blood of most people called the "Rh ; A few people lack it. The name comes from the animal, the Rhesus monkey, used in the experiments which led to the dis
. Adventures with animals and plants. Biology. 2 12 How a Cojnplex Ani?nal Uses Food unit iv. Fig. 213 This pJ:)otograph was taken while the man was donating blood for the third time at a Red Cross Center during World War 11. How was the blood used? Is there still a need for blood dona- tions? work of a great physiologist, Karl Land- steiner, who died in 1943. Also it was discovered recently that there is a substance in the blood of most people called the "Rh ; A few people lack it. The name comes from the animal, the Rhesus monkey, used in the experiments which led to the discovery of the substance. If the mother lacks the Rh factor, the development of the un- born child may be interfered with; some- times the child dies. When transfusions were first given it was necessary to introduce blood from the donor directly into the patient. Since the first World War, thanks to an im- portant discovery made by a scientist in Argentina, Dr. Luis Agote, we have learned to preserve blood so that the red cells do not die. Now blood can be col- lected and kept in blood banks. Using parts of the blood instead of whole blood. At the present time plasma and sometimes serum is used rather than whole blood because neither plasma nor serum need be matched. Besides this, plasma has the great advantage that it can be easily dried and readily preserved without spoiling. With the addition of distilled water dried plasma is ready for use. In this kind of transfusion the wounded receive no red blood cells but this is often not as important as you might think because ordinarily the body has a large supply of these in reserve. During World War II most of the blood which was given through the Red Cross was used to produce dried plasma. Very recently chemists have gone one step farther. They have learned to sep- arate the proteins in plasma from each other. Professor Edwin Cohn of Harvard University has been a leader in this work. It has been found, for example, that not the wh
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