. Text-book of normal histology: including an account of the development of the tissues and of the organs. s temporaryreservoirs for the milk. The nipple consists, in addition to the external covering of pig-mented and greatly wrinkled skin wliich is perforated at the tip bythe openings of the excretory milk-ducts, of a central mass composedof the lactiferous canals and the blood-vessels embedded withinthe fibro-elastic tissue. A considerable amount of unstriped mus-cle exists, disposed as encircling and radiating fibres ; upon thecontraction of this muscle, which responds to mechanical stimul
. Text-book of normal histology: including an account of the development of the tissues and of the organs. s temporaryreservoirs for the milk. The nipple consists, in addition to the external covering of pig-mented and greatly wrinkled skin wliich is perforated at the tip bythe openings of the excretory milk-ducts, of a central mass composedof the lactiferous canals and the blood-vessels embedded withinthe fibro-elastic tissue. A considerable amount of unstriped mus-cle exists, disposed as encircling and radiating fibres ; upon thecontraction of this muscle, which responds to mechanical stimulus,the erectility of the nipple principally depends. The cutaneouspapillae are supplied with numerous nerve-terminations, which insurea high degree of sensitiveness. The subcutaneous tissue of the nipple proper containsno fat; around its baseand over the areolaelevations mark theorifices of the scat-tered groups of littleracemose structureswhich constitute theglands of Mont-gomery. The in-tegument of theareola surroundingthe base of the nippleusually possesses con-siderable pigment, Fig. 277. ^^^==X?:.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphiajblipp
