Comparative Histological Study on Mammary Gland of Domestic Animals

Abstract

The present study was conducted on mammary gland of domestic animals to study and compare the histoarchitecture of mammary glands of different domestic animals. The tissue samples of mammary gland of 6 adult buffalo, 6 cattle, 15 sheep, 15 goats, 6 dogs and 6 pigs were collected. The present study was executed at Department of Veterinary Anatomy, College of Veterinary Science, Sri Venkateswara Veterinary University, Tirupati, Andhra Pradesh during the period of July 2020 to October 2021. The mammary gland comprised of parenchyma and stroma. The active alveoli were lined by a single layer of cuboidal epithelium covered by layer of myoepithelial cells which rested on basement membrane. The resting alveoli were lined by a layer of flattened cells. In lactating gland, number of corpora amylacea was more in alveoli and in non-lactating glands they were numerous in interstitial tissue. The number of corpora amylacea were more in buffalo and sheep followed by cattle and goat and very few in pig and dog. The duct system of mammary gland consisted of intralobular, interlobular, intralobar, interlobar and lactiferous ducts. In lactating gland, the average diameter of intralobular duct was highest in goat followed by sheep, buffalo, cattle, pig and in dog. The average diameter of interlobular duct was highest in pig followed by in goat, sheep, buffalo, cattle and dog. The average diameter of interlobar duct was highest in pig followed by goat, sheep, cattle, buffalo and dog.