New Understanding of the Heart's Evolution »
Posted By Eagle_Eye 3 months, 1 week ago in Health & Fitness
Humans, like other warm-blooded animals, expend a lot of energy and need a lot of oxygen. Our four-chambered hearts make this possible. It gives us an evolutionary advantage: We're able to roam, hunt and hide even in the cold of night, or the chill of winter.
Now scientists have a better understanding how the complex heart evolved.
The story starts with frogs, which have a three-chambered heart that consists of two atria and one ventricle. As the right side of a frog's heart receives deoxygenated blood from the body, and the left side receives freshly oxygenated blood from the lungs, the two streams of blood mix together in the ventricle, sending out a concoction that is not fully oxygenated to the rest of the frog's body.
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Eagle_Eye
I am a female who has lived a complex life with complex situations and have learned a lot from my experiences.
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