amniotic fold

fold (fōld) plica; a thin, recurved margin, or doubling over.

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amniotic fold  the folded edge of the amnion where it rises over and finally encloses the embryo.

aryepiglottic fold  a fold of mucous membrane extending on each side between the lateral border of the epiglottis and the summit of the arytenoid cartilage.

Douglas' fold  a crescentic line marking the termination of the posterior layer of the sheath of the rectus abdominis muscle, just below the level of the iliac crest.

gastric folds  the series of folds in the mucous membrane of the stomach.

gluteal fold  the crease separating the buttocks from the thigh.

head fold  a crescentic, ventral fold of the embryonic disc at the cephalic end of the developing embryo.

lacrimal fold  a fold of mucous membrane at the lower opening of the nasolacrimal duct.

Marshall's fold  vestigial f. of Marshall.

medullary fold  neural f.

mesonephric fold  see under ridge.

nail fold  the fold of palmar skin around the base and sides of the nail.

neural fold  one of the paired folds lying on either side of the neural plate that form the neural tube.

palmate folds  a system of folds on the anterior and posterior walls of the cervical canal of the uterus.

semilunar fold of conjunctiva  a mucous fold at the medial angle of the eye.

skin fold  skinfold.

tail fold  a crescentic, ventral fold of the embryonic disc at the future caudal end of the developing embryo.

ventricular fold , vestibular fold a false vocal cord.

vestigial fold of Marshall  a pericardial fold enclosing the remnant of the embryonic left anterior cardinal vein.

vocal fold  the true vocal cord.

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amniotic fold

n.

A fold of amniotic membrane enclosing the yolk stalk and extending from the point of insertion of the umbilical cord to the yolk sac.

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amniotic fold,

an embryonic growth feature observed in many vertebrates, particularly birds and reptiles. It consists of flaps of ectoderm and mesoderm that grow over the back of an embryo, fuse, and subsequently separate to form the amnion.

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fold [fōld]

plica; a thin margin curved back on itself, or doubling.

amniotic fold the folded edge of the amnion where it rises over and finally encloses the embryo.

aryepiglottic fold a fold of mucous membrane extending on each side between the lateral border of the epiglottis and the summit of the arytenoid cartilage.

circular f's the permanent transverse folds of the luminal surface of the small intestine.

costocolic fold a fold of peritoneum passing from the left colic flexure to the adjacent part of the diaphragm; called also phrenicocolic ligament.

gastric f's the series of folds in the mucous membrane of the stomach.

gluteal fold the crease separating the buttocks from the thigh.

head fold a fold of blastoderm at the cephalic end of the developing embryo.

interdigital fold the free border of the web connecting the bases of adjoining digits.

lacrimal fold a fold of mucous membrane at the lower opening of the nasolacrimal duct.

mucosal fold (mucous fold) a fold of mucous membrane.

nail fold the fold of palmar skin around the base and sides of the nail of a finger or toe.

neural fold one of the paired folds lying on either side of the neural plate that form the neural tube.

semilunar fold of conjunctiva a mucous fold at the medial angle of the eye.

serosal fold (serous fold) a fold of serous membrane.

spiral fold a spirally arranged elevation in the mucosa of the first part of the cystic duct.

tail fold a fold of the blastoderm at the caudal end of the developing embryo.

transverse f's three permanent transverse folds in the rectum.

ventricular fold (vestibular fold) a false vocal cord.

vestigial fold a pericardial fold enclosing the remnant of the embryonic left anterior cardinal vein.

vocal f's true vocal cords.