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Teaching Aids in Rumen Physiology

Department of Dairy Science, University of Illinois, Urbana

T. H. Blosser

Department of Animal Sciences, Washington State University, Pullman

ABSTRACT

While interest is perhaps keener in the chemical constitution of living matter than in its physical makeup, a knowledge of the structural features of what is being analyzed chemically is important. In animals and plants the chemical constituents are combined and arranged into characteristically larger units for further study.

Visual aids for instructional purposes have, for the most part, focused attention on the important role of providing microscopes, fresh specimens, and illustrative classroom materials for students (1, 2). Permanent visual models of biological materials in the experiences of the authors have been virtually nonexistent in certain courses. The following inexpensive procedures were developed for assistance in instructional work.

The rumen fistula has played a significant role in contributing to knowledge of the chemical processes which occur in the rumen. However, the physical processes, which aid in digestion, have been less observed, because of the difficulty encountered in recording these processes, either by instrumentation or visual observation.

² Present address: Department of Animal Sciences, Purdue University, W. Lafayette, Indiana.