. The biology of the frog . other sources. The secreting cells of the liver present different appear-ances in relation to changes in their activity. The granulesof the cells were found by Langley to increase in numberafter a meal. The changes are much more marked whenthe cells have, to start with, a small outer non-granular zone ;in such cases in the 6th to 8th hour of digestion, the outerzone is large, and in the 24th to 30th, the ceils becomegranular throughout. The decrease of granules was found,as a rule, to be accompanied by an increase in the glycogenin the cells, and vice versa. From an
. The biology of the frog . other sources. The secreting cells of the liver present different appear-ances in relation to changes in their activity. The granulesof the cells were found by Langley to increase in numberafter a meal. The changes are much more marked whenthe cells have, to start with, a small outer non-granular zone ;in such cases in the 6th to 8th hour of digestion, the outerzone is large, and in the 24th to 30th, the ceils becomegranular throughout. The decrease of granules was found,as a rule, to be accompanied by an increase in the glycogenin the cells, and vice versa. From analogy with the behaviorof similar granules in other gland cells, Langley considersthe granules in the liver to be concerned in the secretion ofbile. Lahousse finds that granules disappear from the cell vii THE DIGESTIVE SYSTEM AND ITS FUNCTIONS 55 almost entirely eleven or twelve hours after feeding. Five orsix hours after food is given the liver cells are considerablyenlarged, and the capillaries congested. By the eleventh.
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