| crista transversa | A horizontal ridge that divides the fundus of the internal acoustic meatus into a superior and an inferior area. In the former are the introitus of the facial canal and openings for the branches of the vestibular nerve to the utricle and to the ampullae of the anterior and lateral saemicircular canals. In the latter are openings for the cochlear nerve, and for branches of the vestibular nerve to the saccule and to the ampulla of the posterior saemicircular canal. Synonym: crista transversa, falciform crest, transverse crest. (05 Mar 2000) |
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| crista transversalis | A crest or ridge on the occlusal surface of a tooth formed by the union of two triangular crests. Synonym: transverse crest, transverse ridge. (05 Mar 2000) |
| crista triangularis | A crest or ridge which extends from the apex of a cusp of a premolar or molar tooth toward the central part of the occlusal surface. Synonym: triangular crest, triangular ridge. (05 Mar 2000) |
| crista tuberculi majoris | The ridge below the greater tubercle of the humerus into which the pectoralis major muscle inserts. Synonym: crista tuberculi majoris, bicipital ridges, pectoral ridge. (05 Mar 2000) |
| crista tuberculi minoris | The ridge below the lesser tubercle of the humerus into which the teres major muscle inserts. Synonym: crista tuberculi minoris, bicipital ridges. (05 Mar 2000) |
| crista urethralis | Longitudinal mucosal fold in the dorsal wall of the urethra. See: urethral crest of female, urethral crest of male. Synonym: crista urethralis. (05 Mar 2000) |
| crista urethralis femininae | A conspicuous longitudinal fold of mucosa on the posterior wall of the urethra. Synonym: crista urethralis femininae. (05 Mar 2000) |
| crista urethralis masculinae | A longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the prostatic urethra; prominent in its midportion is the seminal colliculus. Synonym: crista phallica, crista urethralis masculinae. (05 Mar 2000) |
| crista vestibuli | <anatomy> An oblique ridge on the inner wall of the vestibule of the labyrinth, bounding the spherical recess above and posteriorly. Synonym: crista vestibuli. (05 Mar 2000) |
| cristae | <cell biology> The folded membranes inside a mitochondrion. (09 Oct 1997) |
| cristae cutis | Ridges of the epidermis of the palms and soles, where the sweat pores open. Synonym: cristae cutis, skin ridges. (05 Mar 2000) |
| cristae matricis unguis | The numerous longitudinal ridges of the nail bed distal to the lunula. Synonym: cristae matricis unguis. (05 Mar 2000) |
| cristae of mitochondria | Cristae mitochondriales, shelflike infoldings of the inner membrane of a mitochondrion. (05 Mar 2000) |
| cristae sacrales intermediae | Crests formed by the fusion of articular processes of all the sacral vertebrae. Synonym: articular crests, cristae sacrales intermediae. (05 Mar 2000) |
| cristae sacrales laterales | Crests which are rough ridges lying lateral to the sacral foramina; they represent the fused transverse processes of sacral vertebrae. Synonym: cristae sacrales laterales. (05 Mar 2000) |