transverse tubule; T-tubule
Specialized anatomical term for the invaginations of the sarcolemma in muscle cells; used in physiology and histology contexts.
Transverse tubules play an important role in excitation-contraction coupling in muscle cells.
筋小胞体 (sarcoplasmic reticulum) is the intracellular calcium store, while 横行小管 are membrane invaginations that conduct the action potential into the cell.
Compound of 横行 (transverse) + 小管 (small tube), directly describing the anatomical structure.