The inner ear processes sounds and is responsible for balance. Tiny hair cells in inner ear transpose sound waves into electrical signals which they send to brain. The
Cracking your knuckles will not increase the risk of arthritis. Although bones appear very hard from outside, inside they look spongy, filled with lots of air. Bones are
There is a liver in every single vertebrate (animals with a backbone, or spinal column) discovered. There are still no good means of artificially replacing the liver.
The adrenal glands lie right above the kidneys and release stress hormones like cortisol and adrenaline. The adrenal glands change size throughout lifetime. At birth, they are slightly
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