Thursday, December 27, 2012

Blood


Blood can be scary and revolting to many.  But it has four major functions:

  • Fights off invaders
  • Warms up and cools down the body
  • Carts away waste
  • Brings oxygen and nutrients to parts of the body.

Blood group

Blood groups can be categorized in many different ways. One well known system is the ABO system developed by Landsteiner. In this system, blood groups are categorized based on their antigens. After ABO system, many more systems have been discovered like the Rh system.
DId you Know: Today, there are over 150 types of classifications for blood like MN system, Kell System etc.

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