Anatomical and Histological Study of the Mammary Gland of the Guinea Pig (Cavia porcellus) in the Andean and Peruvian Races

• Autores: Carranza Marín, Dennis, Valencia León, Roberto, Chauca Francia, Lilia, Torres Polo, Luis, Orrego Vásquez, Fernando
• Formato: artículo
• Fecha de Publicación: 2022
• Institución: Universidad Peruana Cayetano Heredia
• Repositorio: Revistas - Universidad Peruana Cayetano Heredia
• Lenguaje: español
• OAI Identifier: oai:revistas.upch.edu.pe:article/4390
• Enlace del recurso: https://revistas.upch.edu.pe/index.php/STV/article/view/4390
• Nivel de acceso: acceso abierto

The aim of this study was to analyze anatomic and histologically the mammary gland of the guinea pig. Sixteen female guinea pigs were used in two groups for the descriptive study of the mammary glands: Eight guinea pigs Peru breed and eight guinea pigs Andina breed. Each group was divided in subgroups conformed by: two guinea pig with eight weeks of age, three with twenty-one weeks of age and three with thirty-four weeks of age. The microscopic and macroscopic conformation of the structures of the mammary gland, its modifications and characteristics influenced by the age were evaluated. Thirty-three slides were realized for the histological evaluation to study samples of the secretory glandular portion and the nipple. In the glandular portion the conformation of the mammary lobes and lobules in different stages of the secretory process was observed; in the nipple it was observed keratinized stratified squamous epithelium cells and the predominance of irregular dense connective tissue. For the anatomical evaluation it was determined that the discoid shape conformed by two axes (major axis with cranial lateral direction and minor axis). These were located in the groin position related with the medial compartment of the thigh and have a lobed surface. The nipple was located in the right posterior quadrant of the mammary gland and showed a vertical, straight and flexible position.