Date of Award


Document Type


Degree Name

Master of Science




An examination of the lateral head of the gastrocnemius of the PET/Wn!.r mouse was made with an electron microscope. Cells of the perimysium and endomysium were described and the relationship of these cells to muscle cells was characterized. The relationship between melanocytes and muscle cells found in this strain was the major focus. Melanocytes were seen to be present in the perimysium and endomysium with the greatest concentration in the endomysium. Melanocytes of the perimysium appeared segregated from the adjacent tissue by fibroblasts,which surround ed the melanocytes with their cytoplasmic processes, a well as by collagen fibers. Melanocytes of the endomysium were seen to have no direct communication with the muscle cells though there were conical protrusions of the sarcolemma at areas of juxtaposition between the perikaryon of the melanocytes and the muscle cells.

Included in

Biology Commons