What Body Part Doesn't Grow?

By Staff WriterLast Updated Mar 26, 2020 4:04:15 AM ET
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The only human body part that does not grow after birth is the ossicular chain, which is composed of three small bones and is located in the middle ear. These bones are also the smallest lightest bones in the human body. Each bone is smaller than a grain of rice. The stapes is the smallest and is only 2.8 millimeters or 0.11 inch long.