chorionic vesicle


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Related to chorionic vesicle: chorionic villus sampling

vesicle

 [ves´ĭ-k'l]
1. a small bladder or sac containing liquid.
2. a small circumscribed elevation of the epidermis containing a serous fluid; a small blister.
allantoic vesicle the internal hollow portion of the allantois.
auditory vesicle a detached ovoid sac formed by closure of the auditory pit in the early embryo, from which the percipient parts of the inner ear develop.
brain v's the five divisions of the closed neural tube in the developing embryo, including the telencephalon, diencephalon, mesencephalon, metencephalon, and myelencephalon.
brain v's, primary the three earlier subdivisions of the embryonic neural tube, including the forebrain, midbrain, and hindbrain.
brain v's, secondary the four brain vesicles formed by specialization of the forebrain and of the hindbrain in later embryonic development.
chorionic vesicle the chorion of a mammal.
encephalic v's brain vesicles.
germinal vesicle the fluid-filled nucleus of an oocyte toward the end of prophase of its meiotic division.
lens vesicle a vesicle formed from the lens pit of the embryo, developing into the crystalline lens.
olfactory vesicle
1. the vesicle in the embryo that later develops into the olfactory bulb and tract.
2. a bulbous expansion at the distal end of an olfactory cell, from which the olfactory hairs project.
optic vesicle an evagination on either side of the forebrain of the early embryo, from which the percipient parts of the eye develop.
otic vesicle auditory vesicle.
seminal vesicle paired sacculated pouches attached to the posterior urinary bladder; the duct of each joins the ipsilateral ductus deferens to form the ejaculatory duct.
umbilical vesicle the pear-shaped expansion of the yolk sac growing out into the cavity of the chorion, joined to the midgut by the yolk stalk.

chorionic sac

[TE]
the outermost fetal membrane in human embryos, the villous part of which becomes the fetal part of the placenta.
Synonym(s): chorionic vesicle

chorionic vesicle

The outer villus-covered layer of the early embryo. It encloses the embryo, amnion, umbilical cord, and yolk stalk.
See also: vesicle

chorionic

pertaining to the chorion.

chorionic girdle
a circular band of cells of placental origin that invade the endometrium and form the endometrial cups in the mare.
chorionic girdle cells
see chorionic girdle (above).
chorionic gonadotropin
a hormone with properties similar to those of luteinizing hormone; it is secreted in large amounts by the placenta during gestation. It stimulates the formation of interstitial cells in the testes of the fetus and causes the secretion of testosterone. It is found in substantial amounts in the urine of pregnant mares (pregnant mares serum gonadotropin—PMSG) and pregnant women (human chorionic gonadotropin—HCG). It is used as an aid in the treatments to induce ovulation and the synchronization of estrus.
chorionic somatomammotropin
see placental lactogen.
chorionic vesicle
the early embryonic vesicle before the allantois has developed and encircled the embryo to form the chorioallantoic vesicle and supplant it.

vesicle

1. a small bladder or sac containing liquid.
2. a small circumscribed elevation of the epidermis containing a serous fluid; a small blister. See also vesicular disease.

auditory vesicle
a detached ovoid sac formed by closure of the auditory pit in the early embryo, from which the percipient parts of the inner ear develop.
brain v's
the five divisions of the closed neural tube in the developing embryo, including the telencephalon, diencephalon, mesencephalon, metencephalon and myelencephalon.
chorionic vesicle
see chorionic vesicle.
clear vesicle
neuronal vesicles which occur in neuronal terminals in which acetylcholine is the transmitter.
coated vesicle
compound vesicle
multilocular vesicle.
dense core vesicle
neuronal vesicles which occur in neuronal terminals in which norepinephrine or other catecholamine is the transmitter. Called also granular vesicle.
encephalic v's
brain vesicles.
germinal vesicle
the fluid-filled nucleus of an oocyte toward the end of prophase of its meiotic division.
granular vesicle
see dense core vesicle (above).
lens vesicle
a vesicle formed from the lens pit of the embryo, developing into the crystalline lens.
matrix v's
vesicles found in hyaline cartilage; are starting points for growth plate mineralization.
multilocular vesicle
a vesicle with multiple chambers or compartments.
olfactory vesicle
1. the vesicle in the embryo which later develops into the olfactory bulb and tract.
2. a bulbous expansion at the distal end of an olfactory cell, from which the olfactory hairs project.
otic vesicle
auditory vesicle.
pinocytotic v's
vesicles which appear in vascular endothelium; may participate in transcapillary movement of macromolecules.
primary brain v's
the three earlier subdivisions of the embryonic neural tube, including the forebrain, midbrain and hindbrain.
secondary brain v's
the four brain vesicles formed by specialization of the forebrain and of the hindbrain in later embryonic development.
secretory v's
vesicles found in rough excretory endoplasm of cells.
seminal v's
paired sacculated pouches that overlie the urinary bladder in the males of some species; in some the pouch is a simple sac, in others a compound acinous gland, and in some the duct of each joins the ipsilateral ductus deferens to form the ejaculatory duct. In the boar and stallion it produces a bulky ejaculate. See also vesicular gland.
transfer v's
vesicles found in rough endoplasmic reticulum of cells.
transport vesicle
membrane bound vesicle, pinched off from endoplasmic reticulum, containing macromolecules to be transported to other parts of the cell.
umbilical vesicle
the pear-shaped expansion of the yolk sac growing out into the cavity of the chorion, joined to the midgut by the yolk stalk.
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