Anatomy: Animals Inside

Circulatory System

What are blood groups?

Genetically determined blood group systems number in the dozens among humans, but the AB0 and Rh systems are the most important ones used to type blood for human blood transfusions. The following lists the number of blood groups for certain species of animals:

Species

Number of Blood Groups

Pig

16

Cow

12

Chicken

11

Horse

  9

Sheep

  7

Dog

  7

Rhesus monkey

  6

Mink

  5

Rabbit

  5

Mouse

  4

Rat

  4

Cat

  2



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