title: The mammary glands of the Amazonian manatee, Trichechus inunguis (Mammalia: Sirenia): morphological characteristics and microscopic anatomy.
abstract: The mammaries from carcasses of two female Amazonian manatees were examined. Trichechus inunguis possesses two axillary mammaries beneath the pectoral fins, one on each side of the body. Each papilla mammae has a small hole on its apex--the ostium papillare. The mammaries are covered by a stratified squamous keratinized epithelium. The epithelium of the mammary ducts became thinner more deeply in the tissue and varied from stratified to simple cuboidal. There was no evidence of glandular activity or secretion into the ducts of the mammary glands.
authors.affiliation: Laboratório de Mamíferos Aquáticos (LMA), Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Amazonas, Brasil.
authors.forename: Fernanda Rosa
authors.initials: FR
authors.lastname: Rodrigues
authors.forename: Vera Maria Ferreira
authors.initials: VM
authors.lastname: da Silva
authors.forename: José Fernando Marques
authors.initials: JF
authors.lastname: Barcellos
mesh_terms: D000818:Animals; D004847:Epithelial Cells / Q000166:cytology*; D004848:Epithelium / Q000033:anatomy & histology*; D005260:Female; D008321:Mammary Glands, Animal / Q000033:anatomy & histology*; D008853:Microscopy; D020456:Trichechus inunguis / Q000033:anatomy & histology*
keywords: Amazonian manatee; Trichechus inunguis; anatomy; histology; mammary glands