endostyle


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Related to endostyle: pharynx, thyroid gland, Atriopore

endostyle

a ciliated groove on the ventral wall of the pharynx of urochordates, cephalochordates and the ammocoete larva of the lamprey, that passes food by ciliary action backwards to the gullet.
References in periodicals archive ?
Identification of the endostyle as a stem cell niche in a colonial chordate.
For further examination and staging of development of the thoracic bud, including the neural complex, we also analyzed timing of the appearance of ciliation in the endostyle and ciliated funnel by the presence of acetylated tubulin (Fig.
From studies based primarily on the unitary stolidobranch Styela clava, Ermak (1982) reported renewing cell populations in various epithelia including those of the ciliated funnel, endostyle, stigmata, esophagus, and stomach; these are areas in which proliferation was also noted in D.
Endostyle rudiment as a large evagination of inner vesicle opposite to dorsal hollow tube.
To investigate the growth rate of the endostyle at varying food concentrations, animals were cultured under standard and limited food regimes at 15 [degrees]C.
BrdU pulse-chase feeding experiments were carried out to follow DNA replication in the endostyle.
After fixation, endostyle and accompanying oral glands from adult animals were manually microdissected, chromatin was stained with propidium iodide, and tissue was mounted on microscope slides.
After washing for 3 min in PBS-T, samples were mounted in Vectashield, and endostyle nuclei were enumerated with the Leica TCS-SP confocal microscope as above.
The enteropneust pharynx should not be considered less specialized than that of the chordate pharynx on the basis that it lacks an endostyle organ that produces a mucous net.
It is commonly considered that the endostyle of lower chordates may be a homolog and primitive antecedent of the vertebrate thyroid gland, mainly because the organ incorporates iodine (Barrington, 1957, 1958; Salvatore, 1969).
In addition, lower chordates (including tunicates, amphioxus, and lampreys) share an endostyle.
Coincidently with this change in the mode of larval locomotion, most of the primitive chordates or chordate ancestors may have shifted their feeding system to the use of pharyngeal gill slits for extracting suspended food from the water and of an endostyle for secreting mucus to catch the food particles (e.