Theca
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theca [′thē·kə]

(anatomy)

The sheath of dura mater which covers the spinal cord.

(botany)

A moss capsule.

A pollen sac.

(histology)

The layer of stroma surrounding a Graafian follicle.

(invertebrate zoology)

The test of a testate protozoan or a rotifer.

Theca

various types of sheath in animals and plants:

(1) A cell wall in certain amoebae (thecamoebae).

(2) A chitinoid membrane in hydroid polyps; hence the division into the suborders Thecaphora and Athecata.

(3) The connective tissue surrounding ovarian follicles in vertebrates (theca folliculi).

(4) A tooth socket in the jawbone of mammals and crocodiles.

(5) A capsule for spores in mosses.

(6) The valve of a silicified test; in diatoms, the upper half is the epitheca and the lower half, the hypotheca.

(7) The pollen sac of an anther in angiosperms.

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Theca (redirected from theca cordis)

Theca
(redirected from theca cordis)