Discover how dehydration affects major organs, causing visible skin changes from dullness to premature aging, plus practical ...

Circulatory system: Blood vessels Laid end-to-end, an adult's arteries, veins and capillaries would stretch for about 100,000 miles - enough to wrap around the world nearly four times.

Aminoacyl tRNA synthetases picked up new protein domains that participate in vasculature formation around the same time that organisms evolved key adaptations in the circulatory system. Amber Dance is ...