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Fig. 7. Cross-section through the body of a giant (A) and a normal (B) X. laevis tadpole (NF stage 53), taken at the point of maximum body height. The cross-sectional area of axial muscle tissue was 16 times larger in the giant than in the normal tadpole, i.e. 51.28 mm2 vs. 3.14 mm2. DM, dorsal muscle; SC, spinal cord; NT, notochord; K, kidney; VC, visceral cavity. Scale bar, 1 mm.