Zebrafish embryo at the 5-somite stage The cross-sectional view is in the ventral portion of the neural keel. In the lower portion of the image, somites detach from ventral mesoderm. Oriented division...

This is a movie that depicts somite formation in a live knypek; trilobite double mutant embryo. This is a dorsal view with anterior towards the top and time points were 15 minutes apart. Somites in kn...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 14 hour 10 somite stage. The animal pole is to the top for the early stages, and ant...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 12 hour 6 somite stage. The animal pole is to the top for the early stages, and anter...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 18 hour 18-somite stage. The animal pole is to the top for the early stages, and ante...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the Segmentation period at the 19.5 hour 21 somite stage.The animal pole is to the top for the early stages, and a...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Cleavage period at the 1.5 hour 16 cell stage. The animal pole is to the top for the early stages, and anterior...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 3 hour 1000 cell stage. The animal pole is to the top for the early stages, and anterior ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 6 hour shield stage. The animal pole is to the top for the early stages, and anterior is ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 9 hour 90% epiboly stage. The animal pole is to the top for the early stages, and anterio...