The American journal of anatomy . Fig. 3 Internal view of a wax model reconstructed from the left second tho-racic gland of a newborn albino rat. X 40. a, anastomosis; c, collateral duct;, epithelial ingrowth of nipple; , end-bud; , lateral process; , pri-mary duct; , secondary duct; , tertiary duct; , terminal duct. In figures 3 to 6 (from wax reconstructions of the newborn)the intia-epidermal portion of the primary duct is not visible, 362 J. A. MYERS but the primary duct is seen to emerge from the inner surfaceof the epidermal layer of the skin, pass deeply in
The American journal of anatomy . Fig. 3 Internal view of a wax model reconstructed from the left second tho-racic gland of a newborn albino rat. X 40. a, anastomosis; c, collateral duct;, epithelial ingrowth of nipple; , end-bud; , lateral process; , pri-mary duct; , secondary duct; , tertiary duct; , terminal duct. In figures 3 to 6 (from wax reconstructions of the newborn)the intia-epidermal portion of the primary duct is not visible, 362 J. A. MYERS but the primary duct is seen to emerge from the inner surfaceof the epidermal layer of the skin, pass deeply into the tela sub-cutanea and suddenly turn at right angles after which it lies paral-. Fig. 4 Internal view of a wax model reconstructed from the right third tho-racic gland of a newborn albino rat. X 40. (For lettering, see fig. 3.) STUDIES ON THE MAMMARY GLAND 363 lei to the surface of the skin. In most cases observed the pri-mary duct extends only a short distance until it divides into twobranches (secondary ducts) nearly equal in size. The extent of the primary duct varies considerably. For in-stance, in the first thoracic and the last inguinal glands the pri-
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectanatomy
