EJPAU 2005. Kulawik M. THE DEVELOPMENT OF THE MUCOUS MEMBRANE OF THE TONGUE WITH SPECIAL EMPHASIS ON THE DEVELOPMENT OF FUNGIFORM PAPILLAE IN THE PRENATAL LIFE OF THE RABBIT

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2005
Volume 8
Issue 4

Topic:

Veterinary Medicine

ELECTRONIC
JOURNAL OF
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AGRICULTURAL
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Kulawik M. 2005. THE DEVELOPMENT OF THE MUCOUS MEMBRANE OF THE TONGUE WITH SPECIAL EMPHASIS ON THE DEVELOPMENT OF FUNGIFORM PAPILLAE IN THE PRENATAL LIFE OF THE RABBIT, EJPAU 8(4), #17.
Available Online: http://www.ejpau.media.pl/volume8/issue4/abs-17.html

THE DEVELOPMENT OF THE MUCOUS MEMBRANE OF THE TONGUE WITH SPECIAL EMPHASIS ON THE DEVELOPMENT OF FUNGIFORM PAPILLAE IN THE PRENATAL LIFE OF THE RABBIT

Mirosława Kulawik
Institute of Zoology, Department of Animal Anatomy, Poznań University of Life Sciences

ABSTRACT

Investigations were conducted on 74 tongues, collected from rabbits being in the 15^th, 18^th, 20^th, 22^nd and 26^th day of prenatal life. On the basis of observations under a light microscope the development of the mucous membrane on the dorsum of the apex and body of the tongue was examined, with special emphasis on the development of fungiform papillae.

The first symptoms of the formation of the primordia of fungiform papillae in the form of thickenings in the epithelium were found on the dorsum of the apex and on the dorsum of the body of the tongue at day 18 and next at day 20 of prenatal life. At day 22 of prenatal life primordia of fungiform papillae already have a connective tissue core and are covered with a two-layer epithelium. In that period primordia of fungiform papillae are well-marked on the surface of the dorsum of the apex and body of the tongue. Next at day 26 of intrauterine life primordia of fungiform papillae are bigger and more distinctly visible. They are covered by the epithelium consisting of 3-4 layers of cells. In the same period, in the epithelium of the primordia of fungiform papillae taste buds were found.

At day 15, 18 and 20 of intrauterine life the mesenchymal tissue was observed under the epithelium, found on the well-marked basement membrane.

At day 22 of prenatal life in the rabbit in the connective tissue forming the lamina propria of the mucosa of the tongue delicate collagen fibers and elastic fibers were observed. At day 26 of prenatal life in the rabbit collagen fibers are seen as more marked, while elastic fibers are still very delicate. The lamina propria of the lingual mucosa starting from day 22 of intrauterine life forms protrusions, which are the connective tissue core of the primordia of fungiform papillae.

Results of histochemical studies showed at day 15, 18 and 20 of prenatal life the presence of glycogen in the cytoplasm of cells in the epithelium and the mesenchymal tissue. At day 22 of prenatal life glycogen was already identified in the light-coloured stained superficial cells of the epithelium, whereas at day 26 of prenatal life no glycogen was detected in the examined structures of the lingual mucosa in the rabbit.

Key words: rabbit, tongue, mucous membrane, fungiform papillae, development.

Mirosława Kulawik
Institute of Zoology, Department of Animal Anatomy, Poznań University of Life Sciences
ul. Wojska Polskiego 71 C
60-625, Poznań
tel: 48 61 8487625
email: kulawik@au.poznan.pl

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