Revista Habanera de Ciencias Médicas
versión On-line ISSN 1729-519X
Encourage by the breast feeding significance, we achieve a research about the histological structure of the sow nipples. The pieces were fixed in formalin and included in paraffin, 6 µm thick histological sections were done. The slices were stained with HE, Masson's triple stain and Periodic Acid Shiff (PAS). The skin which covers the nipples is thin and it shows few dermal papillae. The terminal of the lactiferous ducts is lined by a thick stratified squamous non keratinized epithelium. In the middle layers its cells are rich in glycogen, here the lamina propria builds several thin and high papillaes which are arranged in regular parallels rows, each papillae is surrounded by other six that make alike a regular hexagon. Between the glandular ducts terminal, the epithelium which covers the summit of the nipple is similar but lacks of papillae. The connective tissue around the ducts shows numerous striated muscular fibres, about 15 µm in diameter approximately, arranged in several concentric layers, that alternate regularly circular with radials ones.
Palabras llave : Nipple; sow; striated muscular fibres; glycogen.