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Of the following, which mechanisms are important in the death of erythrocytes (pron:eh-rith-reh-sites) in human blood? Is it

  • A.phagocytosis (pron: fag-eh-seh-toe-sis)
  • B.hemolysis
  • C.mechanical damage
  • D.all of the above

Answer: D

All three mechanisms destroy red cells.

Most are engulfed by macrophages in the spleen and liver - phagocytosis. Some rupture in the circulation, which is haemolysis, and some are damaged mechanically forcing through narrow capillaries. A red cell lives about 120 days.

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