Study on histgenesis of skin in Indian buffalo (Bubalus bubalis)
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Date
2006
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Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana
Abstract
The present study was conducted on 18 Indian buffalo foetuses ranging from 55 cm to 62 cm crown rump length (CRL) to elucidate histomorphological and histochemical development of buffalo foetal skin. The study revealed that thickness of epidermis decreased with increase in CRL, whereas thickness of dermis and total skin thickness increased. The histomorphological observations revealed the initiation of hair follicles as follicular plugs in the forehead region at 10 cm CRL (74 days). The primordia of sweat gland appeared as solid buds from developing follicles at 22.5 cm CRL (124 days). The sebaceous glands started differentiating between hair follicle and primordia of sweat gland at 34.5 cm CRL (151 days). The strands of arrector pili muscle started differentiating in the papillary layer of dermis at 34.5 cm CRL (151 days). The dermal papilla started differentiating at 28 cm CRL (174 days). The developing hair cone was observed at 48 cm CRL (182 days). The sebaceous and sweat glands were fully differentiated at 45.5 cm CRL (175 days). The eruption of hair from hair canal was observed at 62 cm (213 days). Histochemically, epidermis was positive for neutral mucopolysaccharides in early and late gestation. The acid mucopolysaccharides were mainly localized in the papillary layer of dermis. A variable distribution of total lipids was observed in different skin layers.