Theca Definition & Meaning - Merriam-Webster
The meaning of THECA is an enveloping sheath or case of an animal or animal part.
Theca - Wikipedia
In microbiology and planktology, a theca is a subcellular structural component out of which the frustules of diatoms and dinoflagellates are constructed.
THECA Definition & Meaning | Dictionary.com
theca. / thē ′ kə /. , Plural thecae thē ′ sē′,-kē′. A case, covering, or sheath, such as the pollen sac of an anther, the spore case of a moss, or the outer covering of the pupa of certain insects. …
Human theca arises from ovarian stroma and is comprised of …
2023年1月4日 · Theca cells serve multiple essential functions during the growth and maturation of ovarian follicles, providing structural, metabolic, and steroidogenic support.
THECA | definition in the Cambridge English Dictionary
2024年6月5日 · THECA meaning: 1. a layer that covers and protects a body part or a living organism: 2. a layer that covers and…. Learn more.
Where are the theca cells from: the mechanism of theca cells …
Theca cells form in the secondary follicles, maintaining follicular structural integrity and secreting steroid hormones. Two main sources of theca cells exist: Wilms tumor 1 positive (Wt1+) cells native to the ovary and Gli1+ mesenchymal cells migrated from the mesonephros.
Theca of follicle - Wikipedia
In early stages of the ovarian cycle, the developing follicle acquires a layer of connective tissue and associated blood vessels. This covering is called the theca. As development of the secondary follicle progresses, granulosa cells proliferate to form the multilayered membrana granulosum.
Theca - an overview | ScienceDirect Topics
Theca is a Latin word for a casing or sheath. The theca cell layer of the ovarian follicle is an envelope of connective tissue surrounding the granulosa cells. The inner-most layer that is closest to the granulosa cells is called the theca interna; the outer-most layer is called the theca externa.
Theca | anatomy and physiology | Britannica - Encyclopedia Britannica
The theca, or armour, is composed of many textured plates that form one anterior horn and usually two posterior horns, which may help to slow the sinking of the cells. The spines tend to be shorter and thicker in cold salty water and longer and thinner…
Thecal sac - Wikipedia
The thecal sac or dural sac is the membranous sheath (theca) or tube of dura mater that surrounds the spinal cord and the cauda equina. The thecal sac contains the cerebrospinal fluid which provides nutrients and buoyancy to the spinal cord. [1]
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