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Elements
CH2: Elements in the animal body
Question | Answer |
---|---|
Major Elements | (#)= atomic number %= percentage of each element found in an animal's body |
Oxygen (O) | (8) Necessary for cellular respiration; component of water 65% |
Carbon (C) | (6) Primary component of organic molecules 18.5% |
Hydrogen (H) | (1) Component of water and organic molecules; necessary for energy transfer & respiration; ion influences pH of fluids 9.5% |
Nitrogen (N) | (7) Component of all proteins and nucleic acids. 3.3% |
Calcium (Ca) | (20) Component of bones and teeth; required for muscle contraction, nerve impulse transmission, and blood clotting. 1.5% |
Phosphorus (P) | (15) Principal component in backbone of nucleic acids; important in energy transfer (part of ATP); component of bones 1.0% |
Potassium (K) | (19) Principal positive ion within cells; important in nerve function 0.4% |
Sulfur (S) | (16) Component of most proteins 0.3% |
Sodium (Na) | (11) Important positive ion in extracellular fluid; important in nerve function 0.2% |
Chlorine (Cl) | (17) Ion is most abundant negative ion in extracellular fluids 0.2% |
Magnesium (Mg) | (12) Component of many energy-transferring enzymes 0.1% |