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Fig. 3 | EvoDevo

Fig. 3

From: Serial blockface SEM suggests that stem cells may participate in adult notochord growth in an invertebrate chordate, the Bahamas lancelet

Fig. 3

a Enlargement of zone a showing lamellar cells (with alternatively blue-green and pink cytoplasm to set the cells apart clearly) designated a1 through a13. Scale bar = 5 μm. b Lamellar cell a1 in side view at left and in posterior view at right against a light green silhouette of a notochord; the nucleus is red, the cytoplasm is light blue, and the mitochondrion is dark blue. Scale bar (also applicable to d–o) = 5 μm. c SBSEM image of block face showing cell a1, with fibers (Fi) in the cytoplasm and smooth lateral plasma membranes (arrowheads); the inset shows a mitochondrion. Scale bar = 1 μm. d–o Details of lamellar cells a2–a13, some with vacuoles (green). Inset in a7 shows plasma membrane with microtendons (arrowheads) associated with the notochordal sheath. Inset scale bar = 1 μm

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