Blood is blue before it reaches oxygen. this is why your veins are blue
Answer:
Active immunity occurs when our own immune system is responsible for protecting us from a pathogen. Passive immunity occurs when we are protected from a pathogen by immunity gained from someone else.
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Answer:
Type AB positive blood is the universal acceptor because it has both A and B antigen.
Explanation:
O- their RBCs do not have any A, B or Rh antigens and are safe for the transfusion to any blood group. O- and AB+ are known as universal donors and universal acceptors.
CO2 levels of the blood are elevated. CO2 is a acid
