This experiment was carried out to study the morphology of the mesenteric mast cell of the rat.
We used relatively 40 mature, health rats less than 300g^(m) in weights, divided into 4 groups, controlled, carbohydrate, protein and fat, respectively, breeding for 100 days and killed. After that we examined and observed the relative emergence numbers, morphology, staining and distributions of the mast cells in the mesentery and so the following results were obtained.
1. Relative emergence number from the mesenteric mast cells of the controlled group was 75.1±0.6, and most of them contained rich, fine mature granules and seen that mature granules in some of the mast cells were escaped out of the cell. The morphology of mast cell was relatively round or oval.
2. Relative emergence numbers from the merenteric mast cells of the carbohydrate group and protein group were 45.6±1.7, 41.4±1.2. in mature, fine granules were fully contained in the cytoplasm of the carbohydrate group, and the protein group was relatively rare in the cytoplasm and sometimes seen mature granuler escaped from the cell.
3. Relative emergence number of the fat group was 39.5±0.7 and the morphology of the mast cells was relatively oval or collapsed as a whole.
Granules in the cytoplasm were in matare rare.
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