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Shows hematoxylin and eosin stained mid-sagittal sections of the mouse patellar tendon at E17.5 (A, E, I), P1 (B, F, J), P7 (C, G, K), and P14 (D, H, L). Higher magnification images of the midsubstance are shown in E–H and of the tibial insertion sites in I–L. P, patella; T, tibial. Scale bar=100 μm. E17.5, embryonic day seventeen and half; P1, P7, P14, postnatal days 1, 7, 14.
