Human physiology . whythe simplest hypothesis should not also Vie accepted for thelacteal secretion. According to this the epithelial cells of themammary gland have the power of forming the specific organicconstituents of milk from conversion of the crude materials drawnfrom the lymph, not by any cytological process that involves thedisintegration of the protoplasm, but by an essentially chemicalmethod, the exact nature of which is unknown to us,—as in the IX THE SKIN AND CUTANEOUS GLANDS 511 case of all the other secretions. This does not preclude the multi-plication of cells during the activ
Human physiology . whythe simplest hypothesis should not also Vie accepted for thelacteal secretion. According to this the epithelial cells of themammary gland have the power of forming the specific organicconstituents of milk from conversion of the crude materials drawnfrom the lymph, not by any cytological process that involves thedisintegration of the protoplasm, but by an essentially chemicalmethod, the exact nature of which is unknown to us,—as in the IX THE SKIN AND CUTANEOUS GLANDS 511 case of all the other secretions. This does not preclude the multi-plication of cells during the active secretory work of the mammarygland to an extent in excess of the normal, but at present weknow nothing as to the exact manner in which this is to Steinhaus (1892) there is frequent mitotic divisionof the cell nuclei without subsequent cellular division, accom-panied by transformation of the nuclear substance into fat—whichwould explain the origin of the fat of milk. Szabo (1896), on the. s-asgps^M»M£iasm r^yS^ m,^ %iPi^yif en Si /-> S/t /&&» :• • •*J:
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
