head organ

head organ

[′hed ‚ȯr·gən]
(invertebrate zoology)
One of the bulbous structures in the prohaptor of monogenetic trematodes which are openings for adhesive glands.
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References in periodicals archive ?
Scintigraphy Dedicated Detector Head Organs Small (Thyroid) - 1 Pc .
Cephalic area with three lobes, two laterals, with four head organs each, and one moderately developed with two head organs; eyes 4 equidistant; posterior pair large; accessory pigment granules of the eyes uncommon in cephalic region.