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The Frog Tongue: III. Histogenesis and Regeneration Following Complete and Partial Extirpations of Anlagen
Author(s) -
Hammerman David L.
Publication year - 1969
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1969.tb00542.x
Subject(s) - biology , anatomy , tongue , histogenesis , regeneration (biology) , rana , dorsum , pathology , immunohistochemistry , medicine , microbiology and biotechnology , immunology
Tongue anlagen from which the anterior, posterior, right or left lateral halves had been extirpated generally regenerated completely within 15–30 days in Rana catesbeiana and R. clamitans . Regeneration was most rapid and greatest in posterior and median regions. Removal of anterior‐posterior and left‐right middle thirds and of anterior, posterior, right or left dorsal or ventral quarter anlagen ( R. catesbeiana ) showed similar regenerative gradients. Regeneration never occurred when entire anlagen were removed. Extirpations of early and half‐developed lingual cornua were made in metamorphosing and young adult R. catesbeiana, R. clamitans R. palustris and R. pipiens . Regeneration occurred where preoperative cornua did not exceed 1.5 mm, but never when they exceeded this length. It is concluded that anuran tongue anlagen, at the stages operated on, possess considerable reorganizing powers following partial extirpations.