Human anatomy

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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 organ systems. They ensure homeostasis and the viability of the human body.

It comprises a head, hair, neck, trunk (which includes the thorax and abdomen), arms and hands, legs, and feet.

The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human body and their functions. Many systems and mechanisms interact in order to maintain homeostasis, with safe levels of substances such as sugar and oxygen in the blood.

The body is studied by health professionals, physiologists, anatomists, and by artists to assist them in their work.

Composition

Elements of the human body by mass. Trace elements are less than 1% combined (and each less than 0.1%).
Elements of the Human Body.02.svg.png Element Symbol Percent mass Percent atoms
Oxygen O 65.0 24.0
Carbon C 18.5 12.0
Hydrogen H 9.5 62.0
Nitrogen N 3.2 1.1
Calcium Ca 1.5 0.22
Phosphorus P 1.0 0.22
Potassium K 0.4 0.03
Sulfur S 0.3 0.038
Sodium Na 0.2 0.037
Chlorine Cl 0.2 0.024
Magnesium Mg 0.1 0.015
Trace elements < 0.1 < 0.3

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.

More information is available at [ Wikipedia:Composition of the human body ]



These photos are presented for the purposes of identifying various body parts

Images of Human Body
Human anatomy.jpg
Human anatomy
External Head CheekMouthLipEyeEarEar lobeFaceHairNapeNeckNose
Torso AbdomenAnusBackBodyBreastsBubble buttButterfly buttocksButtocksCervixCheekChestClitorisCrotchDimples of VenusEpidermisErogenous zoneGenitalsGluteal cleftGluteal sulcusGluteus maximusHindquarterHipLabiaNipplePenisPerineumPubic hairPubisRectumRhombus of MichaelisSacral triangleScrotumSkinSmall of the backSphincterSpinal grooveStomachSweet spotTesticlesVaginaVulvaWaist
Crotch AnusBasketBald eagleBall crusherClitorisCrotchCrotch ropeGenitalsLabiaPenisPerineumPubic hairPubisRectumScrotumTesticlesVaginaVulva
Limbs AnkleArmCalfFingerFootHandKneeLapLegPalmThighWrist
Internal BloodCoccyxKidneysMuscleNociceptorPelvisRib cageSacrumSpine
Effects ErectionHandprintOrgasmTearVaginal lubrication
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