Organ (anatomy)

In biology, an organ (Latin: organum, "instrument, tool") is a group of tissuesthat perform a specific function or group of functions. Common animalorgans include the heart, lungs, brain, eye, stomach, spleen, pancreas, kidneys, liver, intestines, skin, uterus, bladder, bone, etc. A group of related organs is an organ system.

Organellesare analogous sub-cellularstructures.

Organ systems

Organ system ? a system composed of organs working together to carry out a function.

• Circulatory system
• Digestive system
• Endocrine system
• Integumentary system
• Lymphatic system
• Muscular system
• Nervous system
• Reproductive system
• Respiratory system
• Skeletal system
• Urinary systembg:????? (????????)

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It uses material from the http://en.wikipedia.org/wiki/Organ+%28anatomy%29 Wikipedia article Organ (anatomy).