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Dictionary » O » Organ

Organ

Definition

noun, plural: organs

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


Supplement

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.


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Quick Question-

Basicallly what you have to discuss is differential expression of genes during development, this is involved in cells differentiation but also in organ development (how come most human have only 2 arms, roughly located similarlyin their body plan...)

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by canalon
Fri Apr 17, 2009 8:15 pm
 
Forum: Genetics
Topic: Quick Question-
Replies: 1
Views: 214

How Cell Type triggered by a master gene

Explain how differentiation of a specific cell type (example: muscle differentiation) or formation of an entire organ (example: eye development) is triggered by a single "master gene" (MyoD or ey) expression.

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by Lurrena
Tue Mar 24, 2009 12:42 am
 
Forum: Cell Biology
Topic: How Cell Type triggered by a master gene
Replies: 0
Views: 210

Bible vs Darwin

... unguided why would there not be negative mutations with negative results (as most of them are today) that counteracted evolution or destroyed the organisms? Natural selection prevents negative traits from being passed on. As for destroying organisms, the Earth's history shows that all species ...

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by alextemplet
Mon Mar 02, 2009 4:08 am
 
Forum: Evolution
Topic: Bible vs Darwin
Replies: 293
Views: 26279

Re:

... for the lungs. Would that be your opinion Alex? I'm not sure I follow your reasoning. Maybe I've misunderstood you, but you seem to be saying that organs are not important, only genes. Yet the construction of organs is controlled by genes, is it not? This is where the organs themselves become important. ...

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by AFJ
Sat Feb 28, 2009 7:10 am
 
Forum: Evolution
Topic: Bible vs Darwin
Replies: 293
Views: 26279

Bible vs Darwin

... for the lungs. Would that be your opinion Alex? I'm not sure I follow your reasoning. Maybe I've misunderstood you, but you seem to be saying that organs are not important, only genes. Yet the construction of organs is controlled by genes, is it not? This is where the organs themselves become important. ...

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by alextemplet
Sat Feb 28, 2009 3:25 am
 
Forum: Evolution
Topic: Bible vs Darwin
Replies: 293
Views: 26279
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