Tag Archives: red blood cells

Blood Type


Blood Type

Human blood is classified according to the presence or absence of specific markers, called antigens, on the surface of red blood cells. The most commonly encountered blood group system is the ABO system, which classifies blood based on the presence or absence of two antigens, A and B. There are four blood types in this grouping, A, B, AB, and O. Type AB indicates the presence of both antigens and O the absence of both. What do the symbols + and – represent in the classification of blood? More… Discuss

TODAY’S BIRTHDAY: JAN SWAMMERDAM (1637)


Jan Swammerdam (1637)

Dutch naturalist Jan Swammerdam was a pioneer in the use of the microscope and made valuable contributions to the understanding of human anatomy and the future of anatomical study. He was the first person to observe and describe red blood cells, and he improved techniques for examining, preserving, and dissecting cadavers. However, his primary focus was the study of insects, many of which he described and drew in great detail. What led him to eventually abandon his scientific pursuits? More… Discuss

 

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