This Organ Helps Sea Nomads Dive Deeper for Longer

When we think of the organs that help humans stay alive under the water, the heart and lungs top the list. But there's another organ that deserves recognition as well, though few of us would think to name it. It's the spleen. Mammals have a unique response to having our faces engulfed by water. Our heart rate slows and peripheral blood vessels constrict, shunting blood to vital organs where it's needed most. At the same time, our spleens release a cache of red blood vessels held for this