Microscopic, fingerlike projections that make up the placenta.
KOR-ee-ON-ik VIL-i Fingerlike projections extending from the chorion to the uterine lining. 223
microscopic, finger-like projections that make up the placenta.
the bulk of the placental disc is composed of chorionic villi. The villi reflect progressive extension of the chorionic villous tree, beginning with main fetal stems branching off the chorionic plate early in pregnancy. Branching and formation of new chorionic villi continues in many placentas until term, and fetal nutrient exchange occurs at their interface with the intervillous space
Tiny membrane projections in the developing placenta (the tissue that connects the umbilical cord to the uterus). A procedure called chorionic villus sampling obtains chorionic villi cells for the purpose of prenatal testing, which can be performed as early as the 12th week of pregnancy.
The tiny vessels surrounding the fertile ovum that permit it to become embedded in the uterine wall.
The chorion undergoes rapid proliferation and forms numerous processes, the chorionic villi, which invade and destroy the uterine decidua and at the same time absorb from it nutritive materials for the growth of the embryo.
