Search results
Results From The WOW.Com Content Network
The average 70 kg (150 lb) adult human body contains approximately 7 × 10 27 atoms and contains at least detectable traces of 60 chemical elements. [5] About 29 of these elements are thought to play an active positive role in life and health in humans. [6]
Graphic representation of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. CHNOPS and CHON are mnemonic acronyms for the most common elements in living organisms. "CHON" stands for carbon, hydrogen, oxygen, and nitrogen, which together make up more than 95 percent of the mass of biological systems. [1] "CHNOPS" adds phosphorus and ...
Essential to some species. Some marine algae and shrimp contain arsenic compounds. [11] Toxic to humans in some forms. [11] astatine: 85: 1b: None known. [11] Radioactive. barium: 56: 2ac: Has no known biological role, but a variety of plants concentrate it from the soil, and it has a variety of uses in medicine. [11] Some compounds are toxic.
Although alkaloids act on a diversity of metabolic systems in humans and other animals, they almost uniformly evoke a bitter taste. [13] The boundary between alkaloids and other nitrogen-containing natural compounds is not clear-cut. [14] Most alkaloids are basic, although some have neutral [15] and even weakly acidic properties. [16]
The chemical elements humans consume in the largest quantities are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulphur, summarized as CHNOPS. The chemical compounds that humans consume in the largest quantities and provide bulk energy are classified as carbohydrates, proteins, and fats. Water must be also consumed in large quantities ...
Carbon compounds occur naturally in great abundance on Earth. Complex biological molecules consist of carbon atoms bonded with other elements, especially oxygen and hydrogen and frequently also nitrogen, phosphorus, and sulfur (collectively known as CHNOPS). [2] [3]
Urine from pregnant women contains enough human chorionic gonadotropins for commercial extraction and purification to produce hCG medication. Pregnant mare urine is the source of estrogens, namely Premarin. [33] Urine also contains antibodies, which can be used in diagnostic antibody tests for a range of pathogens, including HIV-1. [35]
Nitrogen: respiratory gas 8.2 × 10 −6: 9.7 × 10 −6: total, nonrespiratory 3-3.7 × 10 −2: Norepinephrine: Neurotransmitter of the sympathetic nervous system: after 15 min rest 2.15-4.75 × 10 −10: when emitted 8.1 × 10 −9: 8.5 × 10 −9: Nucleotide: total 3.1-5.2 × 10 −4: Ornithine: 4-14 × 10 −6: Oxalate: 1-2.4 × 10 −6 ...