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  2. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...

  3. List of human blood components - Wikipedia

    en.wikipedia.org/wiki/List_of_human_blood_components

    Compound Comments In whole blood (g/cm 3) In plasma or serum (g/cm 3) Water: Solvent 0.81-0.86 0.93-0.95 Acetoacetate: Produced in liver 8-40 × 10 −7: 4-43 × 10 −7: Acetone: product of bodyfat breakdown 3-20 × 10 −6: Acetylcholine: Neurotransmitter of the parasympathetic nervous system: 6.6-8.2 × 10 −8: Adenosine triphosphate ...

  4. Biomolecule - Wikipedia

    en.wikipedia.org/wiki/Biomolecule

    Most biomolecules are organic compounds, and just four elements—oxygen, carbon, hydrogen, and nitrogen—make up 96% of the human body's mass. But many other elements, such as the various biometals, are also present in small amounts.

  5. List of biomolecules - Wikipedia

    en.wikipedia.org/wiki/List_of_biomolecules

    For substances with an A- or α- prefix such as α-amylase, please see the parent page (in this case Amylase). A23187 (Calcimycin, Calcium Ionophore); Abamectine; Abietic acid

  6. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    The metal, or various compounds, can be toxic to humans. [13] In plants, aluminum can be the primary limitation on growth in acidic soils. [14] antimony: 51: 2c: Has no known biological role, but has a variety of uses in medicine, e.g. antibacterial. [15] Some compounds are highly toxic to humans. [11] argon: 18: 2: None known. [11] None known ...

  7. Biochemistry - Wikipedia

    en.wikipedia.org/wiki/Biochemistry

    The chemistry of the cell also depends upon the reactions of small molecules and ions. These can be inorganic (for example, water and metal ions) or organic (for example, the amino acids, which are used to synthesize proteins). [7] The mechanisms used by cells to harness energy from their environment via chemical reactions are known as metabolism.

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