| rectosigmoid junction | <anatomy> The site where the sigmoid colon becomes the rectum; usually takes the form of an acute angle, demarcated externally by a discontinuation of appendices epiploicae, a spreading out of the teniae coli to completely encircle the rectum, and consequently, termination of the sacculations (haustrae) between the teniae. (05 Mar 2000) |
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| cell junction | <cell biology> Specialised junctions between cells. See: adherens junctions, desmosomes, tight junctions, gap junctions. (26 Mar 1998) |
| cementodentinal junction | <dentistry> The surface at which the cementum and dentin of the root of a tooth are joined. Synonym: dentinocemental junction. (05 Mar 2000) |
| cementoenamel junction | <dentistry> The surface at which the enamel of the crown and the cementum of the root of a tooth are joined. See: cervical line. (05 Mar 2000) |
| right splicing junction | Boundary between the right end of an intron and the left end of the adjacent exon. Synonym: acceptor splicing site. (05 Mar 2000) |
| choledochoduodenal junction | That part of the duodenal wall traversed by the ductus choledochus, ductus pancreaticus, and ampulla. (05 Mar 2000) |
| communicating junction | <cell biology> Another name for a gap junction. (05 Jan 1998) |
| mucocutaneous junction | The site of transition from epidermis to the epithelium of a mucous membrane. (05 Mar 2000) |
| muscle-tendon junction | The union of a muscle and tendon fibre in which sarcolemma intervenes between the two; the end of the muscle fibre may be rounded, conical, or tapered. Synonym: muscle-tendon junction. (05 Mar 2000) |
| costochondral junction | <anatomy> The point where the ribs articulate with the sternum (cartilaginous articulation). (10 Nov 1998) |
| myoneural junction | The synaptic connection of the axon of the motor neuron with a muscle fibre. See: motor endplate. Synonym: neuromuscular junction. (05 Mar 2000) |
| posterior junction line | Radiographic image of the mediastinal septum between the upper lobes behind the oesophagus, above the aortic arch. (05 Mar 2000) |
| sacrococcygeal junction | The cartilaginous articulation of the coccyx with the sacrum. Synonym: articulatio sacrococcygea, coccygeal joint, junctura sacrococcygea, sacrococcygeal junction, symphysis sacrococcygea. (05 Mar 2000) |
| sclerocorneal junction | The margin of the cornea overlapped by the sclera. Synonym: limbus corneae, corneal margin, sclerocorneal junction. (05 Mar 2000) |
| Holliday junction | <molecular biology> A structure which occurs during homologous recombination between homologous chromosomes. While the two chromosomes are side by side, one strand of DNA on each chromosome is broken and then attached to the broken strand of DNA on the other chromosome. The crossover point, which is called the Holliday junction, is able to slide up and down between the two chromosomes, so that a little or a lot of DNA can ultimately be switched between them. (09 Oct 1997) |