Histomorphological studies of the prenatal development of oesophagus of one humped camel (camelus dromedarius)
Journal Title: Agricultural Advances - Year 2012, Vol 1, Issue 4
Abstract
A Histomorphological study was conducted on the oesophagus of 35 foetuses of the one-humped camel collected from the Sokoto metropolitan abattoir, over a period of five months at different gestational ages. The approximate age of the foetuses was estimated from the crown vertebral rump length (CVRL) and samples were categorised into first, second and third trimester. At the first trimester, only three layers were identified, ie; Tunica mucosa, Tunica muscularis and Tunica adventitia. At the second trimester, the orientation of fibres changed, resembling that of the adult with all the four layers prominent i.e. Tunica mucosa, Tunica sub-mucosa, Tunica muscularis and Tunica adventitia. At the third trimester, the Oesophageal gland appeared prominently in the tunica sub-mucosa resembling that of the adult camel. The Tunica mucosa epithelium was simple squamous epithelium at first trimester and began to change at second trimester to stratified squamous epithelium. At third trimester, the epithelium was keratinized stratified squamous epithelium with the oesophageal (sub-mucosal) glands appearing to be prominent and abundant. The tunica muscularis showed clearly a single layer at second trimester while at third trimester; both inner circular and outer longitudinal layers appeared. The tunica adventitia was typical. Blood vessels and nerve fibres became very visible at the tunica sub-mucosa and muscularis in third trimester fetuses. Based on the above findings, it showed that development of the camels’ oesophagus (based on embryonic stages) was morphological in succession. Presence of keretinised stratified squamous epithelium throughout the length of the oesophagus showed adaptive features of the animal to its environment and mode of feeding. Base on histological differentiation, camels’ oesophagus had little/few similarities with true ruminants embryologically.
Authors and Affiliations
A. Bello*| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria., B. I. Onyeanusi| Department of Veterinary Anatomy, Ahmadu Bello University Zaria., M. L. Sonfada| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria., J. B. Adeyanju| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria., A. A. Umar| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria., M. A. Umaru| Department of veterinary medicine,surgery and Theriogenology,Usmanu Danfodiyo University, Sokoto, Nigeria., S. A. Shehu| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria., S. A. Hena| Department of Veterinary Anatomy, Usmanu Danfodiyo University, Sokoto, Nigeria.
Keywords
Related Articles
- EP ID EP488
- DOI -
- Views 634
- Downloads 42
Determinants of loan repayment of livestock farmers under agricultural credit guarantee scheme (A.C.G.S) in Etche local
This study examined the determinants of loan repayment of livestock farmers under the Agricultural Credit Guarantee Scheme (ACGS) in Etche Local Government Area of Rivers State, Nigeria. Simple random sampling techniq...
Opportunities and challenges of adopting community forestry: a case study of Nepall
This study aims to investigate the dynamics of forest management handed over to the local user groups in three districts of Nepal with due consideration of local-specific conservation and development requirements. A to...
Survey, surveillance and cultural characteristics of Alternaria leaf blight of cotton
The roving survey undertaken in four districts viz., Parbhani, Nanded, Osmanabad, and Beed of Marathwada region revealed that average Alternaria blight incidence was ranged from 14.60 to 30.03 per cent. Bt. Cotton crop...
Significance of parity, year-season and prolificacy in influencing goat milk production traits
Milk production traits in goats are affected by different non genetic factors and the knowledge of these factors is essential for efficient management and for accurate estimation of breeding values. Adjusting for the k...
Women participation in agriculture and rural development activities in bengaje community of Sokoto state, Nigeria
The study was conducted to identify and asses the various community development programmes designed and implemented by Sokoto Agricultural and Community Development Project (SACDP) with the assistance of international...