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Fig. 4. Transcutaneous ultrasonographs of the liver of (A) fasting garter snakes and (B) snakes 2 days after feeding. Both figures are cross-sectional images through the snake. Left is ventral, right is dorsal. 1, liver; p, hepatic portal vein, v, hepatic vein; s, stomach; *imaging artifacts. Scale, major dimensions, 10 mm.