| 释义 |
Definition of chorion in English: chorionnoun ˈkɔːrɪənˈkɔriˌɑn Embryology The outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals it contributes to the formation of the placenta. 〔胚〕绒毛膜，卵壳 Example sentencesExamples - Care was exercised not to separate the amniotic sac into its components, the chorion and amnion.
- Each embryo is surrounded, from exterior to interior, by the chorion, the vitelline membrane and the embryonic membrane.
- A needle was used to roll the embryo out of the chorion.
- Together with part of the chorion, these membranes make up the placenta, which physically attaches the embryo to the uterine wall of its mother.
- In insects, the genes that encode the proteins of the egg membrane, the chorion, become amplified in the surrounding follicle cells.
OriginMid 16th century: from Greek khorion. Definition of chorion in US English: chorionnounˈkôrēˌänˈkɔriˌɑn Embryology The outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals (including humans), it contributes to the formation of the placenta. 〔胚〕绒毛膜，卵壳 Example sentencesExamples - Together with part of the chorion, these membranes make up the placenta, which physically attaches the embryo to the uterine wall of its mother.
- In insects, the genes that encode the proteins of the egg membrane, the chorion, become amplified in the surrounding follicle cells.
- A needle was used to roll the embryo out of the chorion.
- Each embryo is surrounded, from exterior to interior, by the chorion, the vitelline membrane and the embryonic membrane.
- Care was exercised not to separate the amniotic sac into its components, the chorion and amnion.
OriginMid 16th century: from Greek khorion. |