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Morphology of Esophagus of Black Bengal Goat

M. S. Islam
Department of Anatomy and Histology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Bangladesh

M. A. Awal
Department of Anatomy and Histology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. A. Quasem
Department of Anatomy and Histology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Asaduzzaman
Department of Anatomy and Histology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S. K. Das
Department of Anatomy and Histology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The morphology of esophagus of Black Bengal goat was studied 6 Black Bengal goats of over six months of age of both sex in the Department of Anatomy and Histology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh using. The topography, shape, size, esophageal length including cervical and thoracic parts were measured. The esophagus was sampled at six sites – cranial cervical, middle cervical, caudal cervical, at the level of thoracic inlet, at the middle mediastinum and at the level of cardia. The esophagus was 45-50 cm long. The cervical part of esophagus was 13-15 cm long and the thoracic part was 32-30 cm long. The highest and lowest diameter was found 5.1 cm and 3.2 cm at the cardia and at the cranial cervical part of the esophagus respectively.

Keywords: Morphology, Esophagus, Black Bengal goat

Location: Department of Anatomy and Histology, Bangladesh Agricultural University (BAU), Mymensingh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Goat

Objectives:

To determine the Morphology of Esophagus of Black Bengal Goat

Methodology:

A total of six Black Bengal goats over 6 months of age of both sex were sacrificed to study the morphology of esophagus in the Department of Anatomy and Histology, Bangladesh Agricultural University (BAU), Mymensingh. The animals were purchased from local market, near the BAU, Mymensingh. Prior to killing, the animals were weighed after fasting for 12 hours. The animals were bled to death by dissecting the left common carotid artery, through which the fixing solution containing 10% formalin, 1% phenol and 0.05% glycerin was injected for fixation. Following dissection, length and diameter of esophagus at different level was measured and recorded.

Source of Information: Bangl. J. Vet. Med. 6 (2). 2008: 223–225

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The esophagus of Black Bengal goat was consisted of two parts – cervical and thoracic parts. This observation was similar to Getty (1975). On the other hand, according to Miller et al. (1964) the esophagus of dog was divided into three parts- cervical, thoracic, abdominal parts. Williams et al. (1995) stated that the esophagus of human is divided into three parts cervical, thoracic, abdominal parts .In Black Bengal goat cranial cervical part of the esophagus laid dorsally to the trachea. At the third cervical vertebra the esophagus was inclined to the left surface of the trachea. It maintained its relation until it reached the sixth cervical vertebra where it went to the dorsal surface of the trachea at the thoracic inlet. The esophagus of Black Bengal goat was 45-50 cm long. The cervical part of esophagus was 13-15 cm long and the thoracic part of esophagus was 32-30 cm long. On the other hand, Getty (1975) stated that in bovine the length of esophagus was 90-105 cm long. The length of the cervical esophagus was 42-49 cm and the thoracic esophagus was 48-56 cm in bovine (Getty, 1975; Ghosh, 1998). In sheep, the length of esophagus was 45 cm long and diameter at the pharynx was 1.8 cm and 2.5 cm at the cardia (Getty, 1975). The length of esophagus was 125-150 cm long in horse (Getty, 1975). The cervical part was 75 cm, the thoracic part was 63 cm and abdominal part was 2 cm in horse (Ghosh, 1998). The length of esophagus was about 30 cm and 2 cm in diameter in dog (Miller et al., 1964). The esophagus of human was 25 cm long and 2.54 cm wide (Russell, 1974). The diameter of esophagus in different animals of Black Bengal goat ranges from 3.2 to 5.1 mm.

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