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 597
- Downloads 42
Nutrient-water interaction in citrus: recent developments
Water along with fertilizer use efficiency and commercial citriculture grow in tandem for global trade and tariff. Optimising water and fertilizer requirement through micro-irrigation and fertigation constitute an impo...
Evaluation on reaction of early maturing maize lines and hybrids to fusarium ear rot
In order to investigate the amount of resistance in and early maturity lines and hybrids to ear rot fusarium disease, an experiment was caried out with 56 lines and 34 hybrids which were extracted from material corn an...
Determination of larval development stages in beluga (Huso huso Linnaeus, 1758)
The study of egg andlarvae stages tn fishes is one of new fields in Ichthyology. There are manychanges in larvae stage and the study of fish bio-history can provide someinformation about the changes of this stage to us...
Use of water quality index and geographical information system to assess groundwater quality
There are several factorsinfluencing the water quality based on its usage. An attempt has been made tounderstand the ground water quality near the some industrial parts of Marvdashtcity. the following 8 parameters have...
Nutritional composition of green banana flour irradiated (gluten-free)
The green banana flour (Musa spp.) was treated with gamma irradiation at doses 1.0 and 3.0 kGy and its changes were evaluated in relation to vitamin B1 and C content, besides nutritional properties. Vitamin B1 was determ...