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  2. List of human cell types - Wikipedia

    en.wikipedia.org/wiki/List_of_human_cell_types

    On 2021, Stephen Quake guessed that the upper limit of the number of human cell types would be around 6000, based on a reasoning that "if biologists had discovered only 5% of cell types in the human body, then the upper limit of cell types to discover is somewhere around 6000 (i.e., 300/0.05)." [10] Other different efforts have used different ...

  3. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    The number of cells in these groups vary with species; it has been estimated that the human body contains around 37 trillion (3.72×10 13) cells, [7] and more recent studies put this number at around 30 trillion (~36 trillion cells in the male, ~28 trillion in the female).

  4. 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 ...

  5. Atlas of cells offers a milestone leap in understanding of ...

    www.aol.com/atlas-cells-offers-milestone-leap...

    An ambitious project launched in 2016 has made a dent in one of biology’s greatest challenges — with more than 3,600 researchers profiling more than 100 million cells.

  6. Atlas of cells transforms understanding of human body - AOL

    www.aol.com/atlas-cells-transforms-understanding...

    An ambitious plan to map all 37 trillion cells in the human body is transforming understanding of how our bodies work, scientists report. The received wisdom said we were built from around 200 ...

  7. Human body - Wikipedia

    en.wikipedia.org/wiki/Human_body

    The human body is composed of elements including hydrogen, oxygen, carbon, calcium and phosphorus. These elements reside in trillions of cells and non-cellular components of the body. The adult male body is about 60% total body water content of some 42 litres (9.2 imp gal; 11 US gal).

  8. List of human hormones - Wikipedia

    en.wikipedia.org/wiki/List_of_human_hormones

    nearly every cell in the body increased metabolism 5 Thyroxine: T 4: Amino acid derivative thyroid gland: Thyroid follicular cell / Tyrosine: thyroid hormone receptor: nearly every cell in the body Control carbohydrate, protein and fat metabolism and control physical, mental growth of body 6 Dopamine: DA Amino acid derivative substantia nigra ...

  9. Human genome - Wikipedia

    en.wikipedia.org/wiki/Human_genome

    Most human cells are diploid so they contain twice as much DNA (~6.2 billion base pairs). ... By 2018, the total number of genes had been raised to at least 46,831 ...