Organ (biology) | Wikipedia audio article
Channel: Subhajit Sahu
Date: 2018-12-27

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Organ_(anatomy)


00:01:31 1 Structure
00:01:41 1.1 Tissue
00:03:10 1.2 Organ systems
00:04:05 2 Function
00:04:15 2.1 Animals
00:06:56 2.2 Plants
00:08:28 3 Society and culture
00:09:11 4 History
00:10:50 4.1 Antiquity
00:11:37 4.2 Modern times
00:13:44 5 Origin and evolution



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Voice name: en-GB-Wavenet-A


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SUMMARY
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Organs are collections of tissues with similar functions. Plant and animal life relies on many organs that coexist in organ systems.Organs are composed of main tissue, parenchyma, and "sporadic" tissues, stroma. The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart, while sporadic tissues include the nerves, blood vessels, and connective tissues. The main tissues that make up an organ tend to have common embryologic origins, such as arising from the same germ layer. Functionally-related organs often cooperate to form whole organ systems. Organs exist in all organisms. In single-celled organisms such as bacteria, the functional analogue of an organ is known as an organelle. In plants there are three main organs. A hollow organ is an internal organ that forms a hollow tube, or pouch such as the stomach, intestine, or bladder.
In the study of anatomy, the term viscus is used to refer to an internal organ, and viscera is the plural form. 79 organs have been identified in the human body.