| membrana adamantina | The primary enamel cuticle, consisting of two extremely thin layers (the inner one clear and structureless, the outer one cellular), covering the entire crown of newly erupted teeth and subsequently abraded by mastication; it is evident microscopically as an amorphous material between the attachment epithelium and the tooth. Synonym: cuticula dentis, adamantine membrane, dental cuticle, membrana adamantina, Nasmyth's cuticle, Nasmyth's membrane, skin of teeth. (05 Mar 2000) |
|---|---|
| membrana adventitia | The outermost connective tissue covering of any organ, vessel, or other structure not covered by a serosa; instead, the covering is properly derived from without (i.e., from the surrounding connective tissue) and does not form an integral part of such organ or structure. Synonym: tunica adventitia, membrana adventitia. Origin: L. Adventicius, coming from abroad, foreign, fr. Ad, to + venio, to come (05 Mar 2000) |
| membrana atlanto-occipitalis anterior | anterior atlanto-occipital membrane |
| membrana atlanto-occipitalis posterior | The fibrous membrane that attaches between the posterior arch of the atlas and the posterior margin of the foramen magnum. Synonym: membrana atlanto-occipitalis posterior. (05 Mar 2000) |
| membrana basalis ductus saemicircularis | The basal membrane underlying the epithelium of the saemicircular duct. Synonym: membrana basalis ductus saemicircularis, basal lamina of saemicircular duct. (05 Mar 2000) |
| membrana basilaris | A thin layer of tissue covered with mesothelial cells that separates the cochlea from the scala tympani in the ear. (18 Nov 1997) |
| membrana capsularis | The hyaloid vascular network around the posterior pole of the lens in the embryo. (05 Mar 2000) |
| membrana capsulopupillaris | The lateral portion of the vascular tunic of the lens of the eye in the embryo. (05 Mar 2000) |
| membrana carnosa | A layer of smooth muscular tissue in the integument of the scrotum. See: dartos muliebris. Synonym: tunica dartos, dartos muscle, membrana carnosa, tunica carnea. (05 Mar 2000) |
| membrana cerebri | Any one of the cerebral meninges. (05 Mar 2000) |
| membrana choriocapillaris | The internal layer of the choroidea of the eye, composed of a very close capillary network. Synonym: lamina choroidocapillaris, choriocapillaris, entochoroidea, lamina choriocapillaris, membrana choriocapillaris, Ruysch's membrane. (05 Mar 2000) |
| membrana cordis | <anatomy> A double membranous sac which envelops and protects the heart. The layer in contact with the heart is referred to as the visceral layer, the outer layer in contact with surrounding organs is the parietal pericardium. In between the two layers is the pericardial space. (27 Sep 1997) |
| membrana cricothyroidea | <anatomy> An elastic membrane which lies anteriorly in the neck adjacent the cricoid cartilage and the first tracheal ring. This is the membrane which is pierced or incised when performing a cricothyroidotomy. (13 Nov 1997) |
| membrana decidua | The mucous membrane of the pregnant uterus that has already undergone certain changes, under the influence of the ovulation cycle, to fit it for the implantation and nutrition of the ovum; so-called because the membrane is cast off after labour. Synonym: membrana decidua, caduca, decidua, Hunter's membrane. (05 Mar 2000) |
| membrana eboris | The lining membrane of the pulp cavity of a tooth, consisting of the odontoblastic layer. Synonym: ivory membrane. (05 Mar 2000) |