Abstract
Rabbits were fed on diets containing 1.0% chromic oxide. They received a single injection into the marginal auricular vein of an isotonic solution containing radioactive phosphate and slaughtered 5 or 20 hours after injection. Chromic oxide, radioactive phosphorus and total phosphorus were determined in the contents of various portions of the gastro- intestinal tract.
The results obtained are summarized as follows.
1) The chromic oxide content of dry matter was a little higher in the stomach and fairly lower in the small intestine than in the feed, and rose gradually down to the anus.
2) The radiophosphorus content of dry matter was very low in the stomach, but very high in the small intestine and lowered remarkably down to the anus.
3) The total phosphorus content of dry matter was very low in the stomach, but fairly high in the small intestine and in the cecum, and lowered gradually down to the anus.
4) Remarkable absorption was thus confirmed in the large intestine, especially in the colon and rectum, in the rabbit
