You might be familiar with the fact that our wisdomteeth are a 'vestigial structure' - a body part that we've evolved to no longer need. But did you know about these four other body parts that are part of our evolutionary legacy?
: Located on each side of the nose bridge, near the eyes.Researchers believe that early ancestors relied on sinuses for a more pronounced sense of smell that aided survival. In modern times, aside from moistening and warming the air we breathe, they do not seem to serve a meaningful function. However, these open spaces are prone to infection, either through congestion or illness.
, which could boost nasal cavity defenses. But there is currently no definitive need for sinuses, and people can live without them.Many primates have tails that help them with balance when swinging through trees. However, when apes evolved about 25 million years ago — they did so without tails. This evolution eventually led to humans. Human embryos still
during the beginning of gestation, though it is absorbed back into the body. The remnant that remains is the tailbone, also called the coccyx.. When this happens, surgical removal is usually the treatment, mostly for aesthetic purposes. When a tail does exist, it can reach 5 inches long and consists of connective tissue, blood vessels and muscles — but no bone or cartilage.such as raw meat, leaves, roots, plants, nuts, and bark.
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