blastodermic vesicle

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The modified blastula stage of mammalian embryos, consisting of the embryoblast or inner cell mass and a thin trophoblast layer enclosing the blastocystic cavity or blastocele.
[blasto- + G. kystis, bladder]
Farlex Partner Medical Dictionary © Farlex 2012

blastodermic vesicle

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


The modified blastula stage of mammalian embryos (including human), consisting of the embryoblast (inner cell mass) and a thin trophoblast layer enclosing the blastocystic cavity.
Synonym(s): blastodermic vesicle.
[blasto- + G. kystis, bladder]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


(ves'i-kel) [L. vesicula, a little bladder]
A small blister-like elevation on the skin containing serous fluid. Vesicles may vary in diameter from a few millimeters to a centimeter. They may be round, transparent, opaque, or dark elevations of the skin, sometimes containing seropurulent or bloody fluid. In sudamina, they result from sweat that cannot escape from the skin; in herpes, they are mounted on an inflammatory base, having no tendency to rupture but associated with burning pain. In herpes zoster, they follow dermatomes. In dermatitis venenata, they result from contact with poison ivy or oak and are accompanied by great itching. They are also seen in dermatitis herpetiformis or multiformis. In impetigo contagiosa, they occur, esp. in children, in discrete form, flat and umbilicated, filled with straw-colored fluid, with no tendency to break. They dry up, forming yellow crusts with little itching. They are also seen in vesicular eczema, molluscum contagiosum, miliaria (prickly heat or heat rash), chickenpox, smallpox, and scabies. See: herpes; miliaria

allantoic vesicle

The hollow, enlarged part of the allantois, esp. in birds and reptiles.

auditory vesicle

That portion of the cerebral vesicle from which the exterior ear is formed. Synonym: otic vesicle

blastodermic vesicle


brain vesicle

One of the five embryonic subdivisions of the brain.

cerebral vesicle

Brain vesicle.

chorionic vesicle

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

compound vesicle

Multilocular vesicle.

encephalic vesicle

Brain vesicle.

germinal vesicle

Purkinje vesicle. See: Purkinje, Johannes E. von

lens vesicle

The embryonic vesicle formed from the lens pit. It develops into the lens of the eye.

multilocular vesicle

A vesicle that contains multiple chambers.

optic vesicle

A hollow outgrowth from the lateral aspects of the embryonic brain. The retinae and optic nerves develop from these paired vesicles.

otic vesicle

Auditory vesicle.

primary brain vesicle

One of the three earliest subdivisions of the embryonic neural tube.

seminal vesicle

One of two saccular glands below the urinary bladder in males. The duct from each joins the vas deferens on its own side to form the ejaculatory duct. The seminal vesicle produces an alkaline, fructose-rich secretion that enhances sperm motility and nourishes the sperm.

synaptic vesicle

A membranous sac located within the presynaptic membrane of an axon terminal and containing a neurotransmitter.

transfer vesicle

An intracellular vesicle that carries proteins from one organelle to another; e.g., from the endoplasmic reticulum to the Golgi apparatus.

umbilical vesicle

The portion of the embryonic yolk sac outside the body cavity.
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