What is Organ system?
[[File:SystemExample.jpg|thumb|310x310px|An example of a system: the nervous system]] [[File:TE-Nervous_system_diagram.svg|thumb|352x352px|The nervous system in its place in the body]] In [[biology]], an '''organ system''' is a group of [[Organ (anatomy)|organs]] that work together to perform one or more functions. Each does a particular job in the body, and is made up of certain [[tissues]]. == Organs and their tissue systems == These specific systems are widely studied in [[anatomy]]. They are present in many types of animals. * [[Circulatory system]]: pumping and channeling [[blood]] to and from the body and [[lungs]] with [[heart]], blood and [[blood vessel]]s. * [[Integumentary system]]: The [[skin]], [[hair]], [[fat]], and [[nail (anatomy)|nail]]s. * [[Skeletal system]]: structural support and protection with [[bone]]s, [[cartilage]], [[ligament]]s and [[tendon]]s. * [[Reproductive system]]: the [[sex organs]], such as [[ovary|ovaries]], [[fallopian tube]]s, [[uterus]], [[vagina]], [[mammary gland]]s, [[testes]], [[vas deferens]], [[seminal vesicle]]s and [[prostate]] * [[Digestive system]]: [[digestion]] and processing food with [[salivary gland]]s, [[esophagus]], [[stomach]], [[liver]], [[gallbladder]], [[pancreas]], [[intestine]]s, [[rectum]] and [[anus]]. * [[Urinary system]]: [[kidney]]s, [[ureter]]s, [[urinary bladder|bladder]] and [[urethra]] involved in fluid balance, [[electrolyte]] balance and [[excretion]] of [[urine]]. * [[Respiratory system]]: the organs used for [[breathing]], the [[pharynx]], [[larynx]], [[bronchi]], [[lung]]s and [[diaphragm]]. * [[Endocrine system]]: communication within the body using [[hormone]]s made by [[endocrine gland]]s such as the [[hypothalamus]], [[pituitary]] gland, [[pineal gland]], [[thyroid]], [[parathyroid]] and [[adrenal gland]]s. * [[Immune system]]: protects the [[organism]] from outside Organisms like [[bacteria]], viruses, fungi, and toxins (chemicals made by toxic cells) with proteins called antibodies. ** [[Lymphatic system]]: the transfer of [[lymp