George Washington died after his physician treated his sore throat with bloodletting, but don't let that stop you from ...

But healthy blood circulation is vital for keeping your heart strong, your memory sharp and annoying health bothers like ...

That means that the vans are very busy indeed, all the time. So it's a good job we've got the circulatory system to transport nutrients, water and oxygen to the entire body. Your circulatory ...

Veins between two capillary networks are portal systems. Closed circulatory system, but fluid constituents of blood leak out of capillaries and return to the heart by the second component of the ...

Discover the hidden dangers of internal bleeding, from subtle warning signs to life-saving treatments. Learn how to spot this ...

Locate each of the paired and unpaired branches from the dorsal aorta, using Figure 5.4, pages 58 - 60. Keep function and integration of circulatory system in mind as you locate organs.

This article was originally published with the title “ The Circulatory System of Plants ” in Scientific American Magazine Vol. 200 No. 2 (February 1959), p. 44 doi:10.1038 ...