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Anatomical Study of the Tongue of Indigenous Cow (bos Indicus) in Bangladesh with Special Emphasis on Papillae Distribution

M. N. H. Parvez
Department of Anatomy and Histology, Dinajpur Government Veterinary College, Basherhat, Dinajpur-5200, Bangladesh .

M. T. Rahaman
Department of Anatomy and Histology, Dinajpur Government Veterinary College, Basherhat, Dinajpur-5200, Bangladesh .

Abstract/ Executive Summary:

The present study was conducted on the tongue of six apparently healthy indigenous (Bos indicus) cows of different age and sex and they were collected from local market at Dinajpur district and this research work was conducted in the Department of Anatomy and Histology, Dinajpur Government Veterinary College, Dinajpur during the research period from the month of July 2003 to April 2004. After proper euthanasia, the animals were killed and then the tongues of these animals were dissected out from the carcasses and fixed in 10% neutral buffered formalin solution. In the present study it was observed that the tongue of indigenous cow (Bos indicus) of Bangladesh has three parts: the root, body and an apex. The dorsum linguae was specially more pronounced in its centre and was occupied by numerous types of masticatory and gustatory papillae. The fine rasp-like filiform papillae were more numerous and directed caudally throughout the dorsum and packed closely in front of the fossa linguae throughout the tip, whereas, the club shaped fungi form papillae were irregularly distributed all over the dorsum among the filiform papillae. The broad headed lentil shaped lenticular papillae was also found in the rostral two-thirds of the dorsum but better developed along the mid-line of the tongue. The large conical papillae of the tongue of Bas indicus occurred in the rostral two-thirds of the dorsum with a higher concentration in the middle portion of the tongue, however, the small ones occurred through out the torus. The vallate papillae of the tongue of Bos indicus were 12-20 in number on either side and dispersed in two irregular rows (25-40) in total along the caudolateral two-thirds of the dorsum. The mucosa of the root of the tongue of Bos indicus did not show any specific papillae but it was rather smooth due to diffused lymphoid tissue distribution (lingual tonsil).

Keywords: Tongue, Papillae, Distribution, Indigenous cow

Location: Department of Anatomy and Histology, Dinajpur Government Veterinary College, Dinajpur

Start Date: 00-07-2003

End Date: 00-04-2004

Program Area: Animal Health and Management

Commodity: Cow

Objectives:

To examine anatomical study of the tongue of Indigenous cow in Bangladesh

Methodology:

The present study was conducted on the formalin fixed tongues that were collected from the six apparently healthy adult indigenous cows. The animals were free from diseases and were purchased from local markets at Dinajpur district near Dinajpur Government Veterinary College. After proper euthanasia, the animals were killed and the tongues were dissected out from the carcasses and were transected with the hyoid bone and then washed out with 0.9 % physiological normal saline to avoid food particles and other substances. Then the tongues were fixed in 10% neutral buffered formalin solution. Magnifying glass was used for observing and also for counting of different papillae of the tongues during the time of research work that was conducted in the Department of Anatomy and Histology, Dinajpur Government Veterinary College, Hajee Mohammad Danesh Science and Technology University from the month of July 2003 to April 2004.

Source of Information: Bangl. J. Vet. Med. (2005), 3 (2): 130-133.

Article Link (Online Journal): http://dx.doi.org/10.3329/bjvm.v3i2.11379

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the present findings, the vallate papillae were 13-19 on either side dispersed in 2-3 irregular rows (25-38 in total) along the caudo-Iateral two thirds of the dorsum. Similar findings were observed in Indian buffalo. In contrast with this observation, the vallate papillae between 33 and 39 in number were arranged in the form of an inverted "V" at the root of the tongue. On the other hand, in ox these numbered 8-17 on each side. The vallate papillae are larger in size, 7-8 in number in each side and each papillae is encircled by a wall arranged in irregular double rows at the posterior part of the dorsal surface of the tongue. The mucosa of the root of the tongue of Bos indicus did not show any specific papillae. It was rather smooth due to diffused lymphoid tissue (lingual tonsil) distribution. ln contrast with this observation, the mucosa of the root of the tongue was slightly swollen on either side and showed variably developed folds, indicating the fissures of the lingual follicles.

Knowledge Management: Journal