Chorion
Definition, Meaning & Examples
Pronunciation /ˈkɔɹiɑn/ · Part of speech noun
Quick meaning: Chorion is a noun meaning (anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
Meaning
(anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
More Meanings
- (biology, entomology) The outer case of an insect egg.
- (botany) The outer membrane of seeds of plants.
Example Sentences
The chorion has a predominantly lamellar structure, the lamellae being two-dimensional networks of protein fibrils.
The amnion and chorion begin to develop soon after fertilization and continue to grow until about 28 weeks′ gestation.
Even closely related species may have chorions differing in thickness. In the silkmoths, for example, the chorion of Bombyx is about 25 μm thick while that of Hyalophora is 55 μm thick.
2002, Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems, entry in Encyclopedia of Marine Mammals, page 425, The allantois fuses with the chorion, forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3).
Word Forms
- chorions
- choria
Related Words
Related dictionary entries include epithelioma, choriogenesis, amniochorion, choriodecidua, prochorion, exochorion.
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Sources & Attribution
FreeDictionaryAPI.com / Wiktionary · Original source · CC BY-SA 4.0
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