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Fig. 3. The mouse node and monocilia. Scanning electron micrographs (provided by Daisuke Watanabe and Hiroshi Hamada, Osaka University) showing the node at the distal tip of an E8.0 mouse embryo (A). Higher magnification views show the ventral node cells (B) and individual monocilia (C). Anteroposterior body axes (A, P) and direction of flow (arrow in B) to left side (L) are indicated. Magnifications: x200 (A); x700 (B); x7000 (C).