Editing Organ system (section)

== Humans ==
{{Main|List of systems of the human body}}
[[File:TE-Nervous_system_diagram.svg|thumb|Nervous system in a human body]]
There are 11 distinct organ systems in human beings,<ref>{{cite web | url=https://bio.libretexts.org/Bookshelves/Human_Biology/Book%3A_Human_Biology_(Wakim_and_Grewal)/10%3A_Introduction_to_the_Human_Body/10.4%3A_Human_Organs_and_Organ_Systems | title=Human Organs and Organ Systems | last=Wakim | first=Suzanne | last2=Grewal | first2=Mandeep | date=August 8, 2020 | access-date=October 7, 2020 | archive-date=November 24, 2020 | archive-url=https://web.archive.org/web/20201124225346/https://bio.libretexts.org/Bookshelves/Human_Biology/Book%3A_Human_Biology_(Wakim_and_Grewal)/10%3A_Introduction_to_the_Human_Body/10.4%3A_Human_Organs_and_Organ_Systems | url-status=live }}</ref> which form the basis of [[human body|human anatomy and physiology]]. The 11 organ systems: the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal system, muscular system, endocrine system, lymphatic system, nervous system, and reproductive system. There are other systems in the body that are not organ systems—for example, the [[immune system]] protects the organism from infection, but it is not an organ system since it is not composed of organs. Some organs are in more than one system—for example, the nose is in the respiratory system and also serves as a sensory organ in the nervous system; the testes and ovaries are both part of the reproductive and endocrine systems.
{| class="wikitable"
|-
! Organ system !! Description !! Component organs
|-
| [[Respiratory system]] || breathing: exchange of oxygen and carbon dioxide || [[human nose|nose]], [[human mouth|mouth]], [[paranasal sinuses]], [[pharynx]], [[larynx]], [[trachea]], [[Bronchus|bronchi]], [[lung]]s and [[thoracic diaphragm]]
|-
| [[Human digestive system|Digestive]] and [[excretory system]] || [[digestion]]: breakdown and absorption of [[nutrient]]s, excretion of solid wastes || [[human teeth|teeth]], [[tongue]], [[salivary gland]]s, [[esophagus]], [[stomach]], [[liver]], [[gallbladder]], [[pancreas]], [[small intestine]], [[large intestine]], [[rectum]] and [[Human anus|anus]]
|-
| [[Circulatory system]] || circulate blood in order to transport nutrients, waste, hormones, O<sub>2</sub>, CO<sub>2</sub>, and aid in maintaining pH and temperature || [[blood]], [[heart]], [[arteries]], [[veins]] and [[capillaries]]
|-
| [[Urinary system]] || maintain fluid and electrolyte balance, purify blood and excrete liquid waste ([[urine]])|| [[kidney]]s, [[ureter]]s, [[Urinary bladder|bladder]] and [[urethra]]
|-
| [[Integumentary system]] || exterior protection of body and thermal regulation || [[Human skin|skin]], [[hair]], [[fat]] and [[Nail (anatomy)|nails]]
|-
| [[Human skeleton|Skeletal system]] || structural support and protection, production of blood cells || [[bone]]s, [[cartilage]], [[ligament]]s and [[tendon]]s
|-
| [[Muscular system]] || movement of body, production of heat || [[skeletal muscles]], [[smooth muscles]] and [[cardiac muscle]]
|-
| [[Endocrine system]] || communication within the body using [[hormone]]s made by [[endocrine gland]]s || [[hypothalamus]], [[pituitary]], [[pineal gland]], [[thyroid]], [[parathyroid]] and [[adrenal gland]]s, [[ovaries]] and [[testicles]]
|-
| [[Exocrine gland|Exocrine system]] || various functions including lubrication and protection || [[ceruminous gland]]s, [[lacrimal gland]]s, [[sebaceous gland]]s and [[mucus]]
|-
| [[Lymphatic system]] || return [[lymph]] to the bloodstream, aid immune responses, form white blood cells || lymph, [[lymph nodes]], [[lymph vessels]], [[tonsils]], [[spleen]] and [[thymus]]
|-
| [[Nervous system]] || sensing and processing information, controlling body activities|| [[Human brain|brain]], [[spinal cord]], [[nerves]], [[sensory organ]]s and the following sensory systems (nervous subsystems): [[visual system]], [[olfactory system]], taste ([[gustatory system]]) and [[hearing]] ([[auditory system]])
|-
| [[Human reproductive system|Reproductive system]] || [[sex organ]]s involved in reproduction || [[Ovary|ovaries]], [[fallopian tube]]s, [[uterus]], [[vagina]], [[vulva]], [[Human penis|penis]], [[testicle]]s, [[vas deferens|vasa deferentia]], [[seminal vesicle]]s and [[prostate]]
|}