fold1(redirected from head fold1)
1. in anatomical terms a plica; a thin, recurved margin or doubling.
2. the big skin folds down the front of a merino ram's neck.
see alar fold.
the folded edge of the amnion where it rises over and finally encloses the embryo.
in the developing embryo the cloacal folds divide into the dorsal anal folds, forming the rectum and anus, and the urogenital folds.
connects the right ventral colon with the cecum in the horse.
the permanent transverse folds of the luminal surface of the small intestine.
annular fold separating the coprodeum from the urodeum in the cloaca of birds.
see fold dermatitis.
in the horse connects the small colon with the terminal part of the duodenum.
the deep wrinkles of skin over the nose of brachycephalic dogs and cats. A distinctive feature of the breeds concerned, but often a site of fold dermatitis. The hairs also become a source of irritation to the cornea.
skin fold from the lower, lateral abdominal wall to the hindlimb at the region of the stifle.
see gastric folds.
in the horse connects the stomach and duodenum to the liver, vena cava and pancreas.
a transverse peritoneal fold in the pelvis that supports the vas deferens in the male and is the broad ligament of the uterus in the female.
extends from the root of the tongue to the base of the epiglottis.
the crease separating the buttocks from the thigh, usually absent from domestic mammals.
a fold of blastoderm at the cephalic end of the developing embryo.
a short mesenteric fold connecting the ileum and the cecum, and which is used to define the ileum in domestic animals.
a fold of mucous membrane at the rostral opening of the nasolacrimal duct.
mucosal fold1, mucous fold1
a fold of mucous membrane.
the fold of palmar skin around the base and sides of the nail or claw.
one of the paired folds lying on either side of the neural plate that form the neural tube in the developing embryo.
the telescopic fold of preputial skin which invests the glans of the stallion's unengorged penis. In the mare, a mucosal fold covering most of the clitoris.
the fold of mucosa which runs from the lower to upper jaw on the same side of the mouth and caudal to the last molar tooth.
on the internal ventral wall of the rumenoreticulum and separating the rumen from the reticulum.
1. a fold of the blastoderm at the caudal end of the developing embryo.
2. the skin, usually on an obese dog, around the very short tail such as seen on British bulldogs. May be the site of fold dermatitis.
3. site for injection of tuberculin in SID test for tuberculosis in cattle. See also caudal tailfold.
the transverse peritoneal fold which, in the male, carries the seminal vesicles, the deferent duct and the uterus masculinus.
in the bird separates the urodeum from the proctodeum.
ventricular fold1, vestibular fold1
a false vocal cord.
paired lateral folds of peritoneum containing the bladder's round ligaments.
a pericardial fold enclosing the remnant of the embryonic left anterior cardinal vein.
see vocal cords.