shaggy chorion

chorion /cho·ri·on/ (kor´e-on)

1. in human embryology, the cellular, outermost extraembryonic membrane, composed of trophoblast lined with mesoderm; it develops villi, becomes vascularized by allantoic vessels, and forms the fetal part of the placenta.

2. in mammalian embryology, the cellular, outer extraembryonic membrane, not necessarily developing villi.

3. in biology, the noncellular membrane covering eggs of various animals; e.g., fish and insects.chorion´ic

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chorion frondo´sum  the part of chorion bearing villi.

chorion lae´ve  the nonvillous, membranous part of the chorion.

shaggy chorion , villous chorion c. frondosum.

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shaggy chorion,

See villous chorion.