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 683
- Downloads 42
Evaluation of Khazaei Model in Predicting of Water Absorption of Chickpea during Soaking
Water absorption progress of agricultural productions includes two parts. Water absorption rate of initial and second phase are high and low, respectively. The main problem of all existing mathematical models of water ab...
Possibility of using electronic commerce in Iran's fertilizer and pesticides market
In this article, according to statistics published in 2014 Iran IDI's report, Iran's electronic commerce's situation and advance's procedure in the future are studied. Then fertilizer and pesticides market's available...
Genetic parameters for weaning weight of Zimbabwean Nguni cattle accounting for direct-maternal genetic covariances
Five models were fitted to weaning weight data of indigenous Nguni cattle to investigate their suitability for evaluation of breeding values. The animal models were ranked using a simple Mallows statistic. Variance com...
Evaluation of salt tolerance of tomato (Lycopersicon esculentum)
The response of tomato genotype Chef against five salinity levels (distilled water or control, 25, 50, 75 and 100 mM) were studied at germination and early seedling stages. An experiment with conducted by using a compl...
Problem analysis of rice production in wurno irrigation scheme using participatory approaches
Considering the importance of rice in ensuring food security in the nation, there is a need to investigate the problems militating against its production. Participatory methods were employed in this research. Discussio...