| meninx tenuis | The two delicate layers of the meninges, the arachnoid mater and pia mater (vs. The tough pachymeninx or dura mater), considered together; by this concept, the arachnoid and pia are two parts of a single layer, much like the parietal and visceral layers of a serous membrane or bursa; although separated by the subarachnoid space they are connected via the arachnoid trabeculae and become continuous where the nerves and filum terminale exit the subarachnoid space (the cerebrospinal fluid-filled space bounded by the leptomeninges). See: arachnoid, pia mater. Synonym: meninx tenuis, pia-arachnoid, piarachnoid. Origin: Lepto-+ G. Meninx, pl. Meninges, membrane (05 Mar 2000) |
|---|
| vascular meninx | <anatomy> Rarely used term for pia mater. Synonym: meninx vasculosa. (05 Mar 2000) |
|---|---|
| meninx | Any membrane; specifically, one of the membranous coverings of the brain and spinal cord. See: arachnoidea, dura mater, pia mater. Origin: Mod. L. Fr. G. Meninx, membrane Meninx fibrosa, rarely used term for dura mater. (05 Mar 2000) |
| meninx primitiva | The embryonic loose mesenchymatous tissue surrounding the brain and spinal cord; from it the three definite meninges (arachnoidea, dura mater, and pia mater) are derived. Synonym: meninx primitiva. Meninx serosa, obsolete term for arachnoidea; the arachnoid is actually not a serous membrane. (05 Mar 2000) |
| meninx vasculosa | <anatomy> Rarely used term for pia mater. Synonym: meninx vasculosa. (05 Mar 2000) |
| primitive meninx | The embryonic loose mesenchymatous tissue surrounding the brain and spinal cord; from it the three definite meninges (arachnoidea, dura mater, and pia mater) are derived. Synonym: meninx primitiva. Meninx serosa, obsolete term for arachnoidea; the arachnoid is actually not a serous membrane. (05 Mar 2000) |
| stratum circulare tunicae muscularis intestini tenuis | Circular layer of muscular coat of small intestine. (05 Mar 2000) |
| stratum longitudinale tunicae muscularis intestini tenuis | Longitudinal layer of muscular coat of small intestine. (05 Mar 2000) |
| Trichostrongylus tenuis | A species that is a widespread pathogenic parasite of the ceca and small intestines of fowl, including ducks, geese, turkeys, pheasants, and partridges. (05 Mar 2000) |
| tunica mucosa intestini tenuis | The mucous coat of the small intestine. Synonym: tunica mucosa intestini tenuis. (05 Mar 2000) |
| tunica muscularis intestini tenuis | Muscular layer of the wall of the small intestine. Synonym: tunica muscularis intestini tenuis. (05 Mar 2000) |
| tunica serosa intestini tenuis | Serous coat of the small intestine; the peritoneal covering of the external surface of the small intestine. Synonym: tunica serosa intestini tenuis. (05 Mar 2000) |