Examlex
In ratio form, the equivalence statement 1 mi = 1.61 km would be expressed as ______________.
Bloodstream
The circulating fluid system within the body, comprised mainly of blood, that delivers nutrients and oxygen to the cells and carries away waste products.
Antibodies
Proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.
Protein Molecules
Large, complex molecules that play many critical roles in the body, including in the structure, function, and regulation of tissues and organs.
Antigens
Substances that the body recognizes as foreign and that can provoke an immune response.
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