Sarcolemmal evaginations with knob-like or stalked projections in Purkinje fibers of the sheep's heart.
D000818:Animals; D002415:Cats; D002462:Cell Membrane; D005110:Extracellular Space; D008854:Microscopy, Electron; D009132:Muscles; D009206:Myocardium / Q000166:cytology*; D011689:Purkinje Cells / Q000166:cytology*; D012756:Sheep