| insemination, artificial, heterologous | Human artificial insemination in which the semen used is that of a man other than the woman's husband. (12 Dec 1998) |
|---|---|
| insemination, artificial, homologous | Human artificial insemination in which the husband's semen is used. (12 Dec 1998) |
| tooth, artificial | A fabricated tooth substituting for a natural tooth in a prosthesis. It is usually made of porcelain or plastic. (12 Dec 1998) |
| Jarvik artificial heart | A pneumatic artificial heart. (05 Mar 2000) |
| eye, artificial | A ready-made or custom-made prosthesis of glass or plastic shaped and coloured to resemble the anterior portion of a normal eye and inserted for cosmetic reasons in the socket of an enucleated or eviscerated eye. (12 Dec 1998) |
| yeast artificial chromosome | <molecular biology> A vector system that allows extremely large segments of DNA to be cloned. Useful in chromosome mapping, contiguous yeast artificial chromosomes covering the whole Drosophila genome and certain human chromosomes are available. Acronym: YAC (15 Nov 1997) |
| yeast artificial chromosomes | Yeast DNA sequences that have incorporated into them very large foreign DNA fragments; the recombinant DNA is then introduced into the yeast by transformation; the use of yeast artificial chromosomes permits the cloning of large genes with their flanking regulatory sequences. (05 Mar 2000) |
| kidney, artificial | Device(s) which can substitute for normally functioning kidneys in cleansing the blood. (12 Dec 1998) |
| larynx, artificial | A device, activated electronically or by expired pulmonary air, which simulates laryngeal activity and enables a laryngectomised person to speak. Examples of the pneumatic mechanical device are the tokyo and van hunen artificial larynges. Electronic devices include the western electric electrolarynx, tait oral vibrator, cooper-rand electrolarynx and the ticchioni pipe. (12 Dec 1998) |
| liver, artificial | Devices for simulating the activities of the liver. They often consist of a hybrid between both biological and artificial materials. (12 Dec 1998) |
| anal sphincter | See: external anal sphincter, internal anal sphincter. (05 Mar 2000) |
| anatomical sphincter | An accumulation of muscular circular fibres or specially arranged oblique fibres the function of which is to reduce partially or totally the lumen of a tube, the orifice of an organ, or the cavity of a viscus; the closing component of a pylorus. (05 Mar 2000) |
| annular sphincter | A short thickening of circular muscular fibres, similar to a ring; a ring-shaped sphincter as opposed to a segmental sphincter. (05 Mar 2000) |
| antral sphincter | Angular sphincter, thickening of the circular muscular layer forming a proposed intermediate sphincter at the level of the angular notch of the stomach. While the thickening of the circular muscle may indicate the commencement of the pyloric antrum, true functional sphincteric activity distinct from the other peristaltic contractions of the stomach is not observed although some of these may in fact temporarily close off the antrum from the remainder of the stomach lumen. Synonym: antral sphincter, midgastric transverse sphincter, sphincter antri, sphincter intermedius, sphincter of antrum, sphincter of gastric antrum. (05 Mar 2000) |
| basal sphincter | The thickening of the circular muscular coat at the base of the ileal papilla at the terminal ileum. Synonym: sphincteroid tract of ileum. (05 Mar 2000) |