In the 1966 novel Fantastic Journey, by Isaac Asimov, a miniature submarine and crew travel throughout the human circulatory ...

Blood flows into ventricle, which opens into the conus arteriosus where a series of valves prevent back flow of blood. Figure: The regions of the heart form an S-shaped loop, to fit into pericardial ...

As we introduced this new topic last week, we mentioned that the blood circulatory system comprises the blood itself (red cells, white cells, platelets, liquid plasma, dissolved nutrients, waste ...