| conceptus | The product of conception, i.e., embryo and membranes. (05 Mar 2000) |
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| concerted evolution | The ability of two related genes to evolve together as though constituting a single locus. Synonym: coincidental evolution. (05 Mar 2000) |
| concerted model | A model used to explain the allosteric form of cooperativity; in this model, an oligomeric protein can exist in two conformational states in the absence of the ligand; these states are in equilibrium and the one that is predominant has a lower affinity for the ligand (which binds to the protein in a rapid equilibrium fashion). Synonym: concerted model. (05 Mar 2000) |
| concha | In anatomy, a structure comparable to a shell in shape, as the auricle or pinna of the ear or a turbinated bone in the nose. Origin: L. A shell (05 Mar 2000) |
| concha auriculae | The large hollow, or floor of the auricle, between the anterior portion of the helix and the antihelix; it is divided by the crus of the helix into the cymba above and the cavum below. Synonym: concha auriculae. (05 Mar 2000) |
| concha bullosa | Abnormal pneumatization of the middle turbinate which may interfere with normal ventilation of sinus ostia and can result in recurrent sinusitis. (05 Mar 2000) |
| concha nasalis inferior | A thin, spongy, bony plate with curved margins, on the lateral wall of the nasal cavity, separating the middle from the inferior meatus; it articulates with the ethmoid, lacrimal, maxilla, and palate bones, the above bony plate and its thick mucoperiosteum containing an extensive cavernous vascular bed for heat exchange. Synonym: concha nasalis inferior, inferior turbinated bone, turbinated body. (05 Mar 2000) |
| concha nasalis media | The middle thin, spongy, bony plate with curved margins, part of the ethmoidal labyrinth, projecting from the lateral wall of the nasal cavity and separating the superior meatus from the middle meatus, the above bony plate and its thick mucoperiosteum containing a cavernous vascular bed for heat exchange. Synonym: concha nasalis media, middle turbinated bone, turbinated body. (05 Mar 2000) |
| concha nasalis superior | The upper thin, spongy, bony plate with curved margins, part of the ethmoidal labyrinth, projecting from the lateral wall of the nasal cavity and separating the superior meatus from the sphenoethmoidal recess, the above bony plate and its thick mucoperiosteum, which is less vascular than that of the middle and inferior conchae. Synonym: concha nasalis superior, Morgagni's concha, superior turbinated bone, turbinated body. (05 Mar 2000) |
| concha nasalis suprema | A small concha frequently present on the posterosuperior part of the lateral nasal wall; it overlies the supreme nasal meatus. Synonym: concha nasalis suprema, fourth turbinated bone, highest concha, highest turbinated bone, Santorini's concha, concha santorini, supraturbinal, supreme concha, supreme turbinated bone, turbinated body. (05 Mar 2000) |
| concha of ear | The large hollow, or floor of the auricle, between the anterior portion of the helix and the antihelix; it is divided by the crus of the helix into the cymba above and the cavum below. Synonym: concha auriculae. (05 Mar 2000) |
| conchae sphenoidales | Paired ossicles of pyramidal shape, the spines of which are in contact with the medial pterygoid lamina, the bases forming the roof of the nasal cavity. Synonym: conchae sphenoidales, Bertin's bones, Bertin's ossicles, sphenoidal turbinated bones. (05 Mar 2000) |
| conchal cartilage | The cartilage of the auricle. Synonym: cartilago auriculae, cartilage of ear, conchal cartilage. (05 Mar 2000) |
| conchal crest | Bony ridge which articulates with, or provides attachment for, the inferior nasal concha. See: conchal crest of maxilla, conchal crest of palatine bone. Synonym: crista conchalis, turbinated crest. (05 Mar 2000) |
| conchal crest of maxilla | Ridge of the nasal surface of the body of the maxilla that articulates with the inferior nasal concha. Synonym: crista conchalis maxillae. (05 Mar 2000) |