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interdigital cleftspace between digits (toes and fingers)
a fissure or longitudinal opening, especially one occurring during embryonic development.
the slit-like openings in the gills of fish between the branchial arches; also, the homologous branchial grooves between the branchial arches of mammalian embryos.
occasionally seen in cattle particularly Herefords. There is a notch at the mandibular symphysis and the central incisors may be directed centrally.
the sagittal cleft in the frog of the horse's foot.
entrance to the larynx; called also rima glottidis.
common opening of the auditory tubes in birds.
separates the hooves.
a defect in fusion between the central prolabium and one or both lateral mesodermal masses. Most common in dogs of the brachycephalic breeds; may be inherited or caused by environmental factors. Often combined with defects in the palate. Called also primary cleft palate, harelip, cheiloschisis.
Congenital fissure, or split, may involve the hard or soft palate. A common cause of nasal regurgitation in neonates, especially foals. Known to be inherited in some breeds of cattle and dogs, particularly brachycephalic breeds. Called also secondary cleft palate, palatoschisis.
see cleft lip (above). Also occurs commonly in diseases manifest with arthrogryposis, both hereditary as in Charolais cattle and with lupine-induced crooked calf.
see rathke's pouch.
the anterior portion is divided by a longitudinal cleft.