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. 1968 Aug;197(3):709–715. doi: 10.1113/jphysiol.1968.sp008583

Fine structure of tortoise skeletal muscle

Sally G Page
PMCID: PMC1351757  PMID: 5666182

Abstract

1. The fine structure of tortoise skeletal muscle has been studied with the electron microscope.

2. The packing of the A filaments (1·6 μ long) and the I filaments (2·35 μ long) within the myofibril is similar to that in frog twitch fibres.

3. The position of the N line within the I band is found to vary with the sarcomere length.

4. The T-system tubules in these muscles form a three-dimensional network across the fibre at the level of the I band. On either side of the Z line it forms triad relationships with the other network of tubules of the sarco-plasmic reticulum.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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