. The biology of the frog . tsch, Swiecicki, Nussbaum, Griitzner,Langley, and Sewall. In frogs which have been kept forseveral days without food Langley found the cells of thebody of the gland to be enlarged so as to practically obliter-ate the central canal. The contents of the cell are uniformly THE DIGESTIVE SYSTEM AND ITS FUNCTIONS 143 granular and the cell outlines are very indistinct. In one. to two hours after feeding the lumina begin to be obvious,and the granules to disappear from the inner border of thecells. ... Up to the fifth hour these changes becomemore and more marked, and at t
. The biology of the frog . tsch, Swiecicki, Nussbaum, Griitzner,Langley, and Sewall. In frogs which have been kept forseveral days without food Langley found the cells of thebody of the gland to be enlarged so as to practically obliter-ate the central canal. The contents of the cell are uniformly THE DIGESTIVE SYSTEM AND ITS FUNCTIONS 143 granular and the cell outlines are very indistinct. In one. to two hours after feeding the lumina begin to be obvious,and the granules to disappear from the inner border of thecells. ... Up to the fifth hour these changes becomemore and more marked, and at the same time the cells andthe remaining gran-ules they containbecome distinctlysmaller, and the cellsubstance stainsjnore deeply. . .At the period ofmaximum changethe nucleus is muchlarger comparedwith the cell sub-stance than it is dur-ing rest; it is stillsurrounded by fine-ly granular proto-plasm, and it issometimes placednear the outer bor-der of the cells. Thereturn to the normalappearance beginsabout the fifth hour,.
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