The heart and circulatory system of an eight week old embryo beginning with a closeup of it's back within the red chorion. As the camera rotates, the embryo becomes semi-transparent in order to view its beating heart and circulatory system. Once the embryo is in profile, the circulatory system begins fading out. The lungs also fade in and out. The skin fades in almost immediately following the lungs and the camera zooms out to end the scene.