ZONA RADIATA Meaning and
Definition
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Zona radiata, also known as the radiate zone, refers to a specific layer or region found within the embryonic form known as the oocyte, which is the female gametocyte or egg cell. This zone is a crucial part of the formation of the egg in most animals and contains various components that play significant roles in the process of fertilization and early embryonic development.
The zona radiata is primarily composed of a specialized extracellular matrix known as the zona pellucida. This matrix is a glycoprotein-rich structure that surrounds the oocyte and acts as a protective barrier. It plays an essential role in mediating the processes of sperm binding, fertilization, and preventing polyspermy (i.e., the entry of multiple sperms into the egg).
In addition to the zona pellucida, the zona radiata also contains other important components such as the cortical granules, which are secretory vesicles found in the outer oocyte membrane. These granules are involved in different cellular events after fertilization, including the block of polyspermy and the initiation of the early stages of embryo development.
Overall, the zona radiata is a key part of the egg structure that provides protective and functional support for fertilization and early embryonic development.
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The faintly striated investment of the oocyte; z. pellucida.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for ZONA RADIATA
- xona radiata
- sona radiata
- aona radiata
- zina radiata
- zkna radiata
- zlna radiata
- zpna radiata
- z0na radiata
- z9na radiata
- zoba radiata
- zoma radiata
- zoja radiata
- zoha radiata
- zonz radiata
- zons radiata
- zonw radiata
- zonq radiata
- zona eadiata
- zona dadiata
- zona fadiata
Etymology of ZONA RADIATA
The term "zona radiata" is derived from Latin. "Zona" means "zone", and "radiata" means "radiated", referring to a radiating appearance or pattern. In anatomy, "zona radiata" specifically refers to the radiating fibers of the white matter in the cerebral hemisphere of the brain.
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