Organ (anatomy)
Wikipedia, the free encyclopedia - Cite This Source- ''For other uses, see Organ (disambiguation)
Animal organs
Animal organs include the heart, lungs, brain, eye, stomach, spleen, bones, pancreas, kidneys, liver, intestines, skin (the largest human organ), urinary bladder, and the sex organs (uterus in female animals, testicles in male). The internal organs collectively are often called viscera, the plural of the rarely-used term viscus.Plant organs
Plant organs can be divided into vegetative and reproductive. Vegetative plant organs are root, stem and leaf, while reproductive are flower, seed and fruit.The vegetative organs are essential for maintaining the life of a plant (they preform the vital functions, such as photosynthesis), while the reproductive organs are essential in reproduction. But, if there is asexual vegetative reproduction, the vegetative organs are those which create the new generation of plants (see clonal colony).
Organ systems
A group of related organs is an organ system. Organs within a system may be related in any number of ways, but relationships of function are most commonly used. For example the urinary system comprises organs that work together to produce, store, and carry urine.
The functions of organ systems often share significant overlap. For instance, the nervous and endocrine system both operate via a shared organ, the hypothalamus. For this reason, the two systems are combined and studied as the neuroendocrine system. The same is true for the musculoskeletal system, which involves the relationship between the muscular and the skeletal system.
List of major human organ systems
There are typically considered to be eleven major organ systems of the human body.
- Digestive system - Absorption of nutrients and excretion of waste.
- Skeletal system - Support and movement, lymphocyte production
- Muscular system - Support and movement, production of heat
- Nervous system - Integration and coordination through electrochemical signals
- Endocrine system - Integration and coordination through hormones
- Cardiovascular system - Internal transport
- Respiratory system - Elimination of CO2 and absorption of O2
- Reproductive system - Production of offspring.
- Integumentary system - Body covering
- Lymphatic system - Regulate fluids and immunity
- Urinary system - Excretion of nitrogenous waste, and maintain homeostasis of electrolytes
Organs of the human body by region
Head and neck
- brain
- ears
- eye
- mouth
- tongue
- teeth
- lips
- nose
- scalp
- larynx
- pharynx
- salivary glands
- meninges
- thyroid
- parathyroid gland
- skin
Back
Abdomen
- peritoneum
- stomach
- duodenum
- intestine
- colon
- liver
- spleen
- pancreas
- kidney
- adrenal gland
- appendix
- skin
- gall bladder
Pelvis and perineum
- pelvis
- sacrum
- coccyx
- ovaries
- Fallopian tube
- uterus
- vulva
- clitoris
- perineum
- urinary bladder
- testicles
- rectum
- penis
- spleen
Upper limbs/Lower limbs
See also
- Fascia
- Organ transplant
- Organelles, analogous sub-cellular structures
Wikipedia, the free encyclopedia © 2001-2006 Wikipedia contributors (Disclaimer)
This article is licensed under the GNU Free Documentation License.
Last updated on Wednesday March 12, 2008 at 07:29:19 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation