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Home  »  Anatomy of the Human Body  »  pages 510

Henry Gray (1825–1861). Anatomy of the Human Body. 1918.

pages 510

with a fold named the septum spurium; below the opening they fuse to form a triangular thickening—the spina vestibuli. The right venous valve is retained; a small
aperture lies obliquely, and is guarded by two halves, the right and left venous valves; above the opening these unite with each other and are continuous


FIG. 464– Dorsal surface of heart of human embryo of thirty-five days. (From model by His.) (See enlarged image)


FIG. 465– Interior of dorsal half of heart from a human embryo of about thirty days. (From model by His.) (See enlarged image)