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noun, plural: organs

A group of tissues that perform a specific function or group of functions.


Examples of animal organs are heart, lungs, brain, eye, stomach, spleen, bones, pancreas, kidneys, liver, intestines, skin, urinary bladder and sex organs.

Examples of plant organs are the roots, stems, leaves, flowers, seeds and fruits.

Word origin: L. Organum, Gr.; akin to work, and E. Work: cf. F. Organe.

Related terms: organism, organelle, organ system, eco-organ, gustatory organ, sense organ, organ of corti, organ specificity, olfactory organ, floating organ, wandering organ.