In order to produce an effective immune response within the body, the person must be injected with a dosage of a virus or bacteria, and for it to be allowed to grow in the person, which replicates just enough to stimulate a response from the immune system.
Here is an image of the hun age body system
Answer:
Leukocytes are a hindrance in a blood transfusion. They can be filtered out and improve a blood transfusion.
Explanation:
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Enzymes bind with chemical reactants called substrates. There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products.
<span>The human embryo's first blood cells arise in the y</span>olk sac.