[Cellular organization of the osphradia of the lamellibranch mollusks Unio pectorum an Anodonta cygea].
Osphradia of freshwater Lamellibranchia Unio pectorum and Anodonta cygnea are paired arcuate torsus situating in the mantle cavity at either side of the visceroparietal ganglion at the base of the gills. The osphradia are formed by folded unistratified epithelium covering the branchial ganglion and its nerves. Ciliary and mucous glandular cells, specific for the surrounding mantle, are nearly absent in the osphradial epithelium. Under the epithelium of the osphradial sensory area several types of bipolar primary-sensitive cells are situated, they have receptory terminals on the epithelial surface. Along the course of the branchial nerve, there are many uni-, bi- and multipolar neurons having, in most cases, several branchings within the nerve dendrite-like processes and one thin axon-like process running to the branchial ganglion. Together with the sensory function, the osphradial neural apparatus in Lamellibranchia is supposed to realize autonomic reflexes.
D000818:Animals; D005724:Ganglia / Q000166:cytology; D008974:Mollusca / Q000033:anatomy & histology*; D009475:Neurons, Afferent / Q000166:cytology; D012679:Sense Organs / Q000033:anatomy & histology* / Q000294:innervation; D012903:Smell
Kletochnaia organizatsiia osfradiev plastinchatozhabernykh molliuskov Unio pectorum i Anodonta cygea.