More Rumen Comparisons: 6 Weeks of Age
These pictures show how the rumen develops over time when dairy calves are fed various combinations of milk, grain, and hay. As you compare the pictures in this section, keep in mind that a healthy rumen has a dark coloration, which is caused by increased tissue mass and large blood vessels (vascularization). The papillae in a healthy rumen are numerous and visible without magnification. Differences in the number and size of papillae and the color of the rumen wall can be seen easily in these three calves.