Il corpo umano - paperback edition

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Szklarska D, Rzymski P (May 2019). "Is Lithium a Micronutrient? From Biological Activity and Epidemiological Observation to Food Fortification". Biol Trace Elem Res. 189 (1): 18–27. doi: 10.1007/s12011-018-1455-2. PMC 6443601. PMID 30066063. Elements [ edit ] The main elements that comprise the human body (including water) can be summarized as CHNOPS. First, the kidneys filter the blood through their respective nephrons, removing waste products like urea, creatinine and maintaining the proper balance of electrolytes and turning the waste products into urine by combining them with water from the blood. [55] The kidneys filter about 150 quarts (170 liters) of blood daily, but most of it is returned to the blood stream with only 1-2 quarts (1-2 liters) ending up as urine. [56] The urine is brought by the ureters from the kidneys down to the bladder. Not all elements which are found in the human body in trace quantities play a role in life. Some of these elements are thought to be simple common contaminants without function (examples: caesium, titanium), while many others are thought to be active toxins, depending on amount (cadmium, mercury, lead, radioactives). In humans, arsenic is toxic, and its levels in foods and dietary supplements are closely monitored to reduce or eliminate its intake. [2]

a b "Arsenic in Food and Dietary Supplements". US Food and Drug Administration. 22 May 2019 . Retrieved 20 August 2019. Sexually transmitted infections such as syphilis, HIV, chlamydia, HPV and genital warts are spread through sexual intercourse, including oral, vaginal, anal, and manual sex. Many of these infections can be lethal if left untreated though others are mostly harmless. [49] [50] The human body is the structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organs and then organ systems. They ensure homeostasis and the viability of the human body.

Eva Bianconi, Allison Piovesan e Federica Facchin, An estimation of the number of cells in the human body, in Annals of Human Biology, vol.40, n.6, 1º novembre 2013, pp.463–471, DOI: 10.3109/03014460.2013.807878. URL consultato il 3 dicembre 2017. a b c Institute of Medicine (29 September 2006). Dietary Reference Intakes: The Essential Guide to Nutrient Requirements. National Academies Press. pp.313–19, 415–22. ISBN 978-0-309-15742-1 . Retrieved 21 June 2016. Sexually Transmitted Diseases – Information from CDC". www.cdc.gov. 2 August 2021 . Retrieved 7 August 2021. The primary purpose of the reproductive system is to produce new humans in the form of children and ensure their sexual development so that they can produce new humans too. It is composed of the gonads ( testicles and ovaries) which produce eggs and sperm cells ( gametes) and produce hormones necessary for proper sexual development. The rest of the glands and ducts of the reproductive system are responsible for the transportation and sustaining of the gametes and to nurture the offspring. [40]

EN) Organ definition and meaning | Collins English Dictionary, su collinsdictionary.com. URL consultato il 9 dicembre 2017.

The Kidneys – a Basic Guide" (PDF). National Health Service. Archived (PDF) from the original on 9 January 2021 . Retrieved 7 August 2021. Zimmermann, Kim Anne. "Lymphatic System: Facts, Functions & Diseases". LiveScience . Retrieved 4 September 2016. Your Digestive System and How It Works". National Institute of Health . Retrieved 4 September 2016. The body consists of many different types of tissue, defined as cells that act with a specialised function. [10] The study of tissues is called histology and often occurs with a microscope. The body consists of four main types of tissues. These are lining cells ( epithelia), connective tissue, nerve tissue and muscle tissue. [11] The external male reproductive system is made up of the penis and the scrotum which is a sac containing the testicles. The penis consists of the glans, and contains the urethra and urinary meatus – the point where urine exits the penis. The rest of the penis is called the shaft and contains most of the urethra. The glans is covered by a fold of skin called the foreskin, although this can be removed through circumcision. [41] Internal gross anatomy of the male reproductive system

The body's muscular system consists of about 650 muscles that aid in movement, blood flow and other bodily functions, according to the Library of Congress. There are three types of muscle: skeletal muscle which is connected to bone and helps with voluntary movement, smooth muscle which is found inside organs and helps to move substances through organs, and cardiac muscle which is found in the heart and helps pump blood.a b c d e f g h i j k l m n Subcommittee on the Tenth Edition of the Recommended Dietary Allowances, Food and Nutrition Board; Commission on Life Sciences, National Research Council (1 February 1989). "9-10". Recommended Dietary Allowances: 10th Edition. National Academies Press. ISBN 978-0-309-04633-6 . Retrieved 18 June 2016.

Lagassé, Paul (2001). "Nervous System". Columbia Encyclopedia (6thed.). New York Detroit: Columbia University Press Sold and distributed by Gale Group. ISBN 978-0-7876-5015-5. Fratoddi, Ilaria; Venditti, Iole; Cametti, Cesare; Russo, Maria Vittoria (2015). "How toxic are gold nanoparticles? The state-of-the-art". Nano Research. 8 (6): 1771–1799. doi: 10.1007/s12274-014-0697-3. hdl: 11573/780610. ISSN 1998-0124. S2CID 84837060. The endocrine system consists of a network of glands that secrete hormones into the blood. These hormones, in turn, travel to different tissues and regulate various bodily functions, such as metabolism, growth and sexual function, according to Johns Hopkins Medicine. For example, one of the glands in the pancreas - called the endocrine gland - releases hormones called insulin and glucagon to regulate blood sugar. Cardiovascular System". U.S. National Cancer Institute. Archived from the original on 2 February 2007 . Retrieved 16 September 2008. CDC (9 December 2019). "Know Your Risk for Heart Disease | cdc.gov". Centers for Disease Control and Prevention . Retrieved 7 August 2021.Hatton, Ian A.; Galbraith, Eric D.; Merleau, Nono S. C.; Miettinen, Teemu P.; Smith, Benjamin McDonald; Shander, Jeffery A. (26 September 2023). "The human cell count and size distribution". Proceedings of the National Academy of Sciences. 120 (39). doi: 10.1073/pnas.2303077120. ISSN 0027-8424. PMC 10523466. PMID 37722043.