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posted by
mrpg
on Tuesday July 11 2017, @06:38AM
from the you-look-to-sea-to-see-what-you-can-see dept.
from the you-look-to-sea-to-see-what-you-can-see dept.
Most animals have a circulatory system that pumps blood. Sea spiders have a digestive system that can move both food and blood:
Researchers discovered the remarkable physiological strategy after injecting dye into sea spiders—common inhabitants of the world's oceans named for their resemblance to land-based spiders—and watching the flow of blood. They noticed that the animals' hearts were beating weakly. But the digestive system—which is unusually extensive in sea spiders, running down each leg—was contracting in waves, moving food in the gut as well as blood in the surrounding hemocoel cavity, the spider equivalent of veins and arteries.
Respiratory gut peristalsis by sea spiders (DOI: 10.1016/j.cub.2017.05.062) (DX)
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Sea Spiders can Pump Blood with Their Guts
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There will be big changes for you but you will be happy.
(Score: 2) by JoeMerchant on Tuesday July 11 2017, @08:59PM
If your heart stops and you somehow are still conscious and in reasonable physical condition, coughing vigorously will pump as much blood as CPR. It's also exhausting work to pump your own blood this way (just like CPR is exhausting work for a rescuer), so you probably can't buy yourself much time, but maybe worth a shot if somebody is running to get a defibrilator...
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