thyroglossal duct

thy·ro·glos·sal duct

[TA] a transitory endodermal tube in the embryo, carrying thyroid-forming tissue at its caudal end; normally, the duct disappears after the thyroid has moved to its definitive location in the neck; its point of origin is regularly marked on the root of the adult tongue by the foramen cecum; occasionally, its incomplete regression results in the formation of cysts along its embryonic course.
See also: pyramidal lobe of thyroid gland. Synonym(s): ductus thyroglossus [TA], thyrolingual duct

His ca·nal

(hiz kă-nal') Structural opening in a fetus between the posterior tongue and the developing thyroid. Distal part may form a thyroidal pyramidal lobe and the proximal part is usually obliterated.
Synonym(s): Bochdalek duct, duct of His, duct of Vater, thyroglossal duct.

thyroglossal duct

A duct in the embryo that runs between the THYROID GLAND and the back of the tongue. Normally, the thyroglossal duct disappears before birth but part or all of it may persist.

单词	thyroglossal duct
释义	DictionarySeeduct thyroglossal duct thyroglossal duct [thī·rō′gläs·əl ′dəkt] (embryology) A narrow temporary channel connecting the anlage of the thyroid with the surface of the tongue. thyroglossal duct thy·ro·glos·sal duct [TA] a transitory endodermal tube in the embryo, carrying thyroid-forming tissue at its caudal end; normally, the duct disappears after the thyroid has moved to its definitive location in the neck; its point of origin is regularly marked on the root of the adult tongue by the foramen cecum; occasionally, its incomplete regression results in the formation of cysts along its embryonic course. See also: pyramidal lobe of thyroid gland. Synonym(s): ductus thyroglossus [TA], thyrolingual duct His ca·nal (hiz kă-nal') Structural opening in a fetus between the posterior tongue and the developing thyroid. Distal part may form a thyroidal pyramidal lobe and the proximal part is usually obliterated. Synonym(s): Bochdalek duct, duct of His, duct of Vater, thyroglossal duct. thyroglossal duct A duct in the embryo that runs between the THYROID GLAND and the back of the tongue. Normally, the thyroglossal duct disappears before birth but part or all of it may persist.
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