Stroma (animal tissue)

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Prostate under a microscope This image shows the microscopic glands of the prostate
Prostate under a microscope This image shows the microscopic glands of the prostate

In animal tissue, stroma (from Greek στρώμα, meaning “bed”) refers to the connective, non-functional supportive framework of a biological cell, tissue, or organ.
In plants, stroma refers to the fluid of the chloroplast surrounding the thylakoid membrane. The stromata are involved in the synthesis of organic molecules from carbon dioxide and water.

The stroma in animal tissue is contrasted with parenchyma and is synonymous with the interstitial space.

Examples include:

Stromal cells are the non-tumor cells in tumors.

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Stoma/stomata are the pores that regulate the exchange of gases and water vapor between outside air and inside the leaf.The Stoma/stomata and the stroma are different.