Calcium - it helps with bone development
It helps heal and and recreate lost cells like an injury during a game grow new hair
Aldosterone, It is essential in the kidney, salivary glands, sweat glands and colon for the conservation of Sodium
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Examples are ultrasound and MRI machines, PET and CT scanners, and x-ray machines.
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I didn't understand the question all that well
Answer:
the study of the structure, reaction, and composition of different kinds of substances
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