chorion

chorion is a topic covered in the Taber's Medical Dictionary.

To view the entire topic, please or .

Nursing Central is an award-winning, complete mobile solution for nurses and students. Look up information on diseases, tests, and procedures; then consult the database with 5,000+ drugs or refer to 65,000+ dictionary terms. Explore these free sample topics:

-- The first section of this topic is shown below --

(kōr′ē-on″ )

[Gr. chorion, membrane (surrounding the fetus)]
An extraembryonic membrane that, in early development, forms the outer wall of the blastocyst. It is the thicker, outer layer of the two fetal membranes and is formed from the trophoblast and its lining of mesoderm. From it develop the chorionic villi, which grow into the endometrium and will become the fetal portion of the placenta.
SEE: embryo, SEE: placenta, and SEE: umbilical cord for illus.; SEE: trophoblast
chorionic (kōr″ē-on′ik ), adj.

-- To view the remaining sections of this topic, please or --

(kōr′ē-on″ )

[Gr. chorion, membrane (surrounding the fetus)]
An extraembryonic membrane that, in early development, forms the outer wall of the blastocyst. It is the thicker, outer layer of the two fetal membranes and is formed from the trophoblast and its lining of mesoderm. From it develop the chorionic villi, which grow into the endometrium and will become the fetal portion of the placenta.
SEE: embryo, SEE: placenta, and SEE: umbilical cord for illus.; SEE: trophoblast
chorionic (kōr″ē-on′ik ), adj.

There's more to see -- the rest of this entry is available only to subscribers.