Examlex
Most of the chemical elements and compounds found in ____ occur in such low concentrations that recovering these mineral resources takes more energy and money than they are worth.
Immunity
The body's ability to resist or defend against infectious diseases and foreign substances, involving both specific and nonspecific components like antibodies and white blood cells.
Hydroxyapatite
Mineral with the empiric formula 3 Ca3(PO4)2 ∙ Ca(OH)2; the main mineral of bone and teeth.
Collagen
A protein that is the primary structural component of connective tissues in animals and the most abundant protein in mammals.
Proteoglycan
A large molecule made of protein cores with glycosaminoglycan chains, playing various roles in the structure and function of cells and tissues.
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