statocyst

(redirected from statocysts)
Also found in: Dictionary, Encyclopedia.

statocyst

(stăt′ə-sĭst′)
n.
A small organ of balance in many invertebrates, consisting of a fluid-filled sac containing statoliths that stimulate sensory cells and help indicate position when the animal moves.

statocyst

an organ of balance in which a STATOLITH (2) rests amongst hairlike projections of sensory cells. A change in position of the animal moves the statolith against a receptor, sending a nervous impulse to the central nervous system.
References in periodicals archive ?
35 DIC objective with the same video equipment used for whole-animal tilting was used to image micro-tilting of isolated statocysts.
These analyzed specimens of Gonionemus have: around a 10 mm width, four radial channels, a manubrium shorter than the umbrella cavity, a mouth with four lips slightly crenulated, four folded gonads along radial channels leaving the distal part free, between 40 and 44 hollow tentacles, each tentacle has ring-like nematocyst clusters and adhesive pads near the distal end, and one or two statocysts between successive tentacles enclosed in mesoglea near ring canal with a single endodermal club.
The "Veliger" stage appeared after eight to thirteen days and had well developed larval structures (bilobed veil, operculum, statocysts, foot, columellar muscle, larval heart) and a hardened globular proto-shell.
I think of a statocyst as an inside-out tennis ball," explained Dr Mooney.
Then the shaking causes the snails statocyst to release GABA, which binds to the neuron.
puniceus shows simple morphology; it has paired palps and pygidial lobes, but no eyespots, nuchal organs, statocysts, or ciliary rings dorsoanteriorly--an exceptional finding in this group.
The main diagnostic characters of Lovenella are the medusae with indefinite number of statocysts and polyp with hydrotheca well demarcated by a basal line, separating it from the operculum (Fraser, 1944; Kramp, 1959; Bouillon et al.
Gravity receptors, known as statocysts in aquatic invertebrates, are considered to have evolved from underwater vibration receptors (Horridge, 1969, 1971) and to be the earliest true sense organs (Bullock and Horridge, 1965).
rubra, aELH immunoreactivity was found in neurosecretory cells of cerebral and pluropedal ganglia, statocysts, and trabeculae of female gonads (Cummins et al.
Unlike the simpler marine invertebrate vestibular systems like that of nautilus, squid statocysts contain both primary and secondary sensory cells (Williamson, 1990; Burighel et al.