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Diagram of a sarcomere in a moderately extended condition, A, and in a contracted condition, B. K, Krause's membranes; H, plane of Henson; S.E., poriferous sarcous element.

Sarcomere

Diagram of a sarcomere in a moderately extended condition, A, and in a contracted condition, B. K, Krause's…

Sarcostyles from the wing muscle of a wasp. A, A'. A sarcostyles showing degrees of retraction. B. A sarcostyle extended with the sarcous element separated into two parts. C. Sarcostyles moderately extended.

Sarcostyles from Wasp

Sarcostyles from the wing muscle of a wasp. A, A'. A sarcostyles showing degrees of retraction. B. A…