. Human embryology and morphology. Embryology, Human; Morphology. B-£j4vy^rc- mg$m* mp$m. Fia. 57.—Showing the various stages in tho development of the Mamma. A. During the 2nd month. B. At the commencement of the 3rd month. C. At the 5th month. D. At birth. A=Epiblast. b = Subcutaneous tissue (mesoblast). c = Pectoralis major. Thus the ducts come to open on the apex of the nipple. An ampulla is developed in each duct within the base of the nipple. Stage 3 represents the marsupial—the lowest mammalian form of mamma. Stages after Birth.—Stage 5 occurs at puberty; the latent infantile lobular bu
. Human embryology and morphology. Embryology, Human; Morphology. B-£j4vy^rc- mg$m* mp$m. Fia. 57.—Showing the various stages in tho development of the Mamma. A. During the 2nd month. B. At the commencement of the 3rd month. C. At the 5th month. D. At birth. A=Epiblast. b = Subcutaneous tissue (mesoblast). c = Pectoralis major. Thus the ducts come to open on the apex of the nipple. An ampulla is developed in each duct within the base of the nipple. Stage 3 represents the marsupial—the lowest mammalian form of mamma. Stages after Birth.—Stage 5 occurs at puberty; the latent infantile lobular buds again undergo a rapid growth and give rise to the minor lobules and acini. Stage 6 occurs towards the end of pregnancy and consists of a renewed production of glandular tissue. Stage 7 sets in with the menopause and is characterized by an atrophy of the glandular tissue formed in the later stages of development. In the process of subdivision, minor buds of adjacent lobes frequently unite together. Hence it is found difficult, during dissection, to separate the gland into its primary lobes. In any. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Keith, Arthur, Sir, 1866-1955. London : E. Arnold
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
