Skeletal muscle cells are big and easy to see. Their cytoplasm contains a great deal of protein, so they stain dark pink. Their many nuclei are normally located under their surface membranes.
This is skeletal muscle. For now, just focus on telling the cells from what is between them, and recognizing their nuclei. For now, you will have to trust us that these are multinucleated single cells, while the epithelial layer you saw in the last frame was composed of many uninucleate cells.
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Kansas City University of Medicine and Biosciences