ridge (rij) a linear projection or projecting structure; a crest.
ridge [rij]
dental ridge any linear elevation on the crown of a tooth.
dermal ridges cristae cutis.
genital ridge , gonadal ridge a bulge on the medial side of the embryonic mesonephros; the primordial germ cells become embedded in it, forming the primordium of the testis or ovary.
healing ridge an indurated ridge that normally forms deep to the skin along the length of a healing wound.
interureteric ridge a fold of mucous membrane extending across the bladder between the ureteric orifices.
mammary ridge a ridge of thickened epithelium from axilla to groin on each side in the mammalian embryo, along which nipples and mammary glands develop, all but one pair usually disappearing in the human.
mesonephric ridge the more lateral portion of the urogenital ridge, giving rise to the mesonephros.
rete ridges inward projections of the epidermis into the dermis, as seen histologically in vertical sections.
synaptic ridge a wedge-shaped projection of a cone pedicle or of a rod spherule, on either side of which lie the horizontal cells whose dendrites are inserted into the ridge.
urogenital ridge a longitudinal ridge in the embryo, lateral to the mesentery, which later divides into the mesonephric and gonadal ridges.
| mesonephric ridge n. The embryonic urogenital ridge, from which the more medial gonadal ridge is later demarcated. |
ridge [rij]
a linear projection or projecting structure; a crest.
alveolar ridge a bony ridge of the maxilla or mandible, the part of the alveolar process that contains the alveoli; called also alveolar crest.
dental ridge any linear elevation on the crown of a tooth.
Dental ridges in a maxillary molar. From Dorland's, 2000.
dermal r's ridges of the skin produced by the projecting papillae of the corium on the palm of the hand and sole of the foot, producing a fingerprint and footprint characteristic of the individual; called also cristae cutis.
genital ridge the more medial part of the urogenital ridge, giving rise to the gonad.
healing ridge an indurated ridge that normally forms deep to the skin along the length of a healing wound.
incisal ridge the part of the crown of an anterior tooth that makes up the actual incisal portion; see incisal surface, under surface.
interureteric ridge a fold on mucous membrane extending across the bladder between the ureteric orifices.
mammary ridge an ectodermal thickening in early embryos, along which the mammary glands subsequently develop.
mesonephric ridge the more lateral portion of the urogenital ridge, giving rise to the mesonephros.
oblique ridge a variable linear elevation obliquely crossing the occlusive surface of a maxillary molar.
urogenital ridge a longitudinal ridge in the embryo, lateral to the mesentery.
ridge
a linear projection or projecting structure; a crest.
dental ridge
any linear elevation on the crown of a tooth.
healing ridge
an indurated ridge that normally forms deep to the skin along the length of a healing wound.
interureteric ridge
a fold of mucous membrane extending across the bladder between the ureteric orifices.
mammary ridge
milk line; an ectodermal thickening in early embryos, along which the mammary glands subsequently develop.
mesonephric ridge
the more lateral portion of the urogenital ridge of the embryo, giving rise to the mesonephros.
palatine ridge
a number of transverse ridges across the hard palate in some animals.
urogenital ridge
a longitudinal ridge in the embryo, lateral to the mesentery.
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