| The rumen, reticulum and omasum can be compared to a kind of foregut fermentation chamber. |
| That price is the very absence of the selenodont specializations, the most obvious of which is foregut fermentation. |
| These grow inward and eventually fuse to form the endoderm of the midgut, while ectoderm is dragged inward behind them at each end to form the foregut and the hindgut. |
| From the mouth, the esophagus leads to the foregut and then intestine, where digestion and absorption occur. |
| Hence when the stomach develops from the foregut, as a specialized segment of the same, it is supplied by vagus branches. |
| These novel morphological approaches to the study of the ommatidia and the foregut ossicles may have limited application in the fossil record. |
