Fig. 7From: Serial blockface SEM suggests that stem cells may participate in adult notochord growth in an invertebrate chordate, the Bahamas lanceletSBSEM image of block face showing parts of five lamellar cells. Arrows indicate sarcoplasmic reticulum vesicles, and arrowheads indicate mitochondria. DMC and VMC are, respectively, dorsal and ventral Müller cells. Scale bar = 5 μmBack to article page