Anatomy of the Human Body > Page 523	CONTENTS · ILLUSTRATIONS · SUBJECT INDEX

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formed in the ventral part of the sagittal plexus. As the hemispheres extend backward these sinuses elongate by incorporating the more caudal loops of the plexus. The anterior part of the sinus is completed first.

FIG. 481– 4 mm. (See enlarged image)

FIG. 482– 14 mm. (See enlarged image)

FIG. 483– 18 mm. (See enlarged image)

FIG. 484– 21 mm. (See enlarged image)

FIG. 485– 35 mm. (See enlarged image)

FIG. 486– 50 mm. crown-rump length. (See enlarged image)

FIG. 487– 80 mm. crown-rump length.(After Streeter.) (See enlarged image)

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