T tubule — Free Biology Illustration | GPAI | GPAI

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T tubule — Free Biology Illustration | GPAI | GPAI

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T tubule

T tubule

Biology

T tubule

A narrow transverse tubule formed by an inward invagination of the muscle fiber plasma membrane, shown as a small cylindrical or tunnel-like channel penetrating deep into the interior of a striated muscle cell. It is continuous with the surface membrane, typically oriented transversely, and colored similarly to the plasma membrane in pale or light blue against pink muscle tissue. The tubule may appear straight or slightly branching.

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