Ultrastructure of the radula protractor of Busycon canaliculatum. Sarcolemmic tubules and sarcoplasmic reticulum.
D000818:Animals; D002118:Calcium; D007477:Ions; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000166:cytology*; D012508:Sarcolemma; D012519:Sarcoplasmic Reticulum; D012908:Snails / Q000033:anatomy & histology*
D007477:Ions; D002118:Calcium