In anatomy, a viscus (plural viscera) is an internal organ of an animal, in particular an internal organ of the thorax or abdomen. The viscera, when removed from a butchered animal, are known collectively as offal. Internal organs are often informally called guts. Anatomical drawing of the human muscles from the Encyclopédie. ... In biology, an organ (Latin: organum, instrument, tool) is a group of tissues, which perform a specific function or group of functions. ... Diagram of a tsetse fly, showing the head, thorax and abdomen The thorax is a division of an animals body that lies between the head and the abdomen. ... The human abdomen Footballer John Arne Riise flashing his abdominals The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ... Jump to: navigation, search Offal is the entrails and internal organs of a butchered animal. ...

The adjective visceral is used for anything pertaining to the internal organs. The term "viscera" can also be used more inclusively, referring to:

• Cardiovascular system
  • heart
• Respiratory system
  • bronchi
  • lungs
  • trachea
• Endocrine system
  • adrenal gland
• Excretory system
  • kidney
  • ureter
  • urinary bladder
• Gastrointestinal system
  • appendix
  • esophagus
  • gallbladder
  • large intestine
    • appendix
    • cecum
    • colon
    • rectum
  • liver
  • pancreas
  • small intestine
    • duodenum
    • jejunum
    • ileum
  • spleen
  • stomach
• Reproductive system
  • cervix
  • clitoris
  • epididymis
  • ovaries
  • penis
  • testes
  • uterus
  • vagina

Historically, viscera of animals were examined by Roman pagan priests like the haruspices or the augurs in order to divine the future by their shape, dimensions or other factors. The circulatory system or cardiovascular system is the organ system which circulates blood around the body of most animals. ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ... This article needs to be cleaned up to conform to a higher standard of quality. ... A bronchus (plural bronchi, adjective bronchial) is a caliber of airways in the the respiratory tract that conducts air into the lungs. ... Jump to: navigation, search The lungs flank the heart and great vessels in the chest cavity. ... The trachea (IPA /treikiÉ™/), or windpipe, is a tube extending from the larynx to the bronchi in mammals, and from the pharynx to the syrinx in birds, carrying air to the lungs. ... Major endocrine glands. ... In mammals, the adrenal glands (also known as suprarenal glands or colloquially as kidney hats) are the triangle-shaped endocrine glands that sit atop the kidneys. ... The excretory system is the system of an organisms body that performs the function of excretion. ... Jump to: navigation, search Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... Transverse section of ureter. ... The interior of bladder. ... For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... In human anatomy, the vermiform appendix (or appendix) is a blind ended tube connected to the cecum. ... The esophagus (also spelled oesophagus/Å“sophagus), or gullet is the muscular tube in vertebrates through which ingested food passes from the mouth area to the stomach. ... Jump to: navigation, search Gall bladder The gallbladder (or cholecyst) is a pear-shaped organ that stores bile (or gall) until the body needs it for digestion. ... In anatomy of the digestive system, the colon is the part of the intestine from the cecum to the rectum. ... In human anatomy, the vermiform appendix (or appendix) is a blind ended tube connected to the cecum. ... In anatomy of the digestive system, the cecum or caecum is a pouch connected to the large intestine between the ileum. ... In anatomy of the digestive system, the colon or large intestine or large bowel is the part of the intestine from the cecum to the rectum. ... The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. ... Jump to: navigation, search The liver is an organ in vertebrates, including humans. ... Jump to: navigation, search The pancreas is a retroperitoneal organ that serves two functions: exocrine - it produces pancreatic juice containing digestive enzymes endocrine - it produces several important hormones // Anatomy The pancreas is a retroperitoneal organ located posterior to the stomach on the posterior abdominal wall. ... Diagram showing the poop shoot In biology the small intestine is the part of the gastrointestinal tract between the stomach and the large intestine (colon). ... In anatomy of the digestive system, the duodenum is a hollow jointed tube that connects the stomach to the jejunum. ... Diagram of the Human Intestine In anatomy of the digestive system, the jejunum is the central of the three divisions of the small intestine and lies between the duodenum and the ileum. ... In anatomy of the digestive system, the ileum (not to be confused with the ilium, a pelvic bone), is the final section of the small intestine. ... The spleen is a ductless, vertebrate gland that is not necessary for life but is closely associated with the circulatory system, where it functions in the destruction of old red blood cells and removal of other debris from the bloodstream, and also in holding a reservoir of blood. ... Jump to: navigation, search The stomach (Gaster) In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis... Female internal reproductive anatomy Close up view of the ectocervix and external os Schematic frontal view of female anatomy The cervix (from Latin neck) is actually the lower, narrow portion of the uterus where it joins with the top end of the vagina. ... Jump to: navigation, search A womans clitoris extends from the visible portion to a point below the pubic bone. ... Male Anatomy The epididymis is part of the human male reproductive system and is present in all male mammals. ... Human female internal reproductive anatomy Ovaries are a part of a female organism that produces eggs. ... Jump to: navigation, search The penis (plural penises) or phallus (plural phalli) is the external male copulatory organ of some animals, and, in mammals, the external male organ of urination. ... Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... Female internal reproductive anatomy The uterus or womb is the major female reproductive organ of most mammals, including humans. ... Jump to: navigation, search Human female internal reproductive anatomy. ... Jump to: navigation, search City motto: Senatus Populusque Romanus – SPQR (The Senate and the People of Rome) Founded 21 April 753 BC mythical, 1st millennium BC Region Latium Mayor Walter Veltroni (Left-Wing Democrats) Area  - City Proper  1290 km² Population  - City (2004)  - Metropolitan  - Density (city proper) 2,546,807 almost... Jump to: navigation, search Roman Catholic priest LCDR Allen R. Kuss (USN) aboard USS Enterprise A priest or priestess is a holy man or woman who takes an officiating role in worship of any religion, with the distinguishing characteristic of offering sacrifices. ... The bronze sheeps liver of Piacenza, with Etruscan inscriptions A haruspex was a sort of augur in the Roman religion who practiced divination, by inspecting the entrails of sacrificed animals, especially the livers of sacrificed sheep. ... Jump to: navigation, search The Augur was a priest or official in ancient Rome. ...

See also

• Anatomical terms of location