Three dimensional structure of the connective tissue papillae of cat lingual papillae.

Abstract

The surface structure of the connective tissue papilla (CP) of the cat tongue was observed by SEM after fixing with Karnovsky's fixative and removal of the epithelial cell layers with 8N-HCl for 2-3 weeks at room temperature. Small filiform papillae are distributed at the tip as well as in the marginal portion of the anterior tongue, while large filiform papillae are distributed at the central part of the anterior tongue. Middle sized filiform papillae occupy the boundary of the two and the posterior part of the anterior tongue. Fungiform papillae are distributed sporadically among the above mentioned papillae. Several vallate papillae are arranged in a V shape at the boundary of the anterior and posterior tongue. Several large rod-shaped processes are derived from the posterolateral margin of the anterior tongue. Giant conical papillae occupy the posterior surface of the tongue. A large filiform papilla contains CP consisting of one large posterior process (main process) and several small processes (accessory processes) arranged in a circle at the anterior basal margin of the primary connective tissue papilla. A middle sized filiform papilla contains CP consisting of several much smaller processes arranged in a circle. A small filiform papilla contains a short tubular CP. The CP of the fungiform papiilla has a cup-like top with several round depressions. A small zigzag surface structure appears on the CP of the vallate papilla. On the basal half of the CP of the giant conical papilla there is a rugged surface structure, while on the upper half run fine longitudinal fibrous structures that taper towards the top of each papilla. A few glandular ducts open at the basal surface of these giant conical papilla.

Morphology of the Lingual Papillae in the Japanese Marten

“…In the cat (Kobayashi et al, 1988), a large filiform papilla contained the connective tissue core consisting of one large posterior process (main process) and several small processes (accessory processes) arranged in a circle at anterior basal margin of the primary connective tissue core, and a small filiform papilla contained a short tubular connective tissue core. In the treeshrew (Kobayashi and Wanichanon, 1992), the connective tissue core of the filiform papilla looks like a human hand raised with the palm facing towards the tongue tip.…”

“…In the order Carnivora, there have been many SEM studies of the tongues of cat (Boshell et al, 1982;Kobayashi et al, 1988), dog (Iwasaki and Sakata, 1985; Kobayashi et al, 1987), mongoose (Iwasaki et al, 1987), Japanese weasel (Furubayashi et al, 1989), sea otter (Shimoda et al, 1996), Asian black bear (Inatomi and Kobayashi, 1999), bush dog (Emura et al, 2000), panther and Asian black bear (Emura et al, 2001), lion (Emura et al, 2003), tiger (Emura et al, 2004), silver fox (Jackowiak and Godynicki, 2004) and raccoon dog and fox (Emura et al, 2006). Such studies reveal variations in morphology and distribution of papillae on the dorsal lingual surface among animal species.…”

Scanning Electron Microscopic Study on the Tongue and Lingual Papillae of the adult Spotted Seal, Phoca largha

“…Main protrusion of filiform CTCs were found on the posterior part of each central concavity. Regarding the lingual papillae of the dog tongue (Kobayashi et al, 1987(Kobayashi et al, , 1988b(Kobayashi et al, ,c, 1992, the CTCs of the filiform papillae also exhibited central concavities and main protrusions that were situated at posterior part of each CTC. These structural characteristics of each fungiform and filiform CTCs exhibited similarity with present observations.…”

Descrição anatômica da língua do mão-pelada (Procyon cancrivorus)

“…Para gatos, a quantidade de papilas valadas é de quatro a seis, quatro a oito, ou 5,64±1,13 pares, como descrito, respectivamente, por CROUCH (1969) e KOBAYASHI et al (1988), OJIMA et al (1997) e OJIMA (2001), e GUIMARÃES et al, (2007, similarmente ao descrito no mão-pelada, e localizandose próximo à junção do corpo com a raiz (ELLENPORT, 1986), igualmente ao observado no tigre (Panthera tigris altaica) (EMURA et al, 2004). As papilas valadas do mão-pelada são mais numerosas que as cinco papilas valadas descritas no cachorro-vinagre (Speothos venaticus) (EMURA et al, 2000).…”