The evolution of species is truly fascinating. We often study the evolution of certain animals and are amazed at how they have evolved over hundreds of thousands of years. But it wasn't just animals that evolved, our species has also undergone major developments over thousands of years.
This fact is so incredible that some parts of our human body, which today are no longer useful and no longer needed, were of great importance to us and are known as vestigial properties of the human body.
In other words, these traces of the human body are remnants of evolutionary history. Next, we'll tell you about seven parts of the human body that we no longer need, because they have little or no function, but that were likely useful millions of years ago.
1. Palmar grip reflex
This reflex, present from conception, allows babies to grip objects tightly. Interestingly, although human babies lose this reflex in the first few months of life, it remains crucial for young apes to cling to their mothers' fur. This suggests that this reflection, despite its apparent antiquity, is an echo of our arboreal past.
two. Tail effect
During pregnancy, human fetuses develop a small tail, which later retracts and forms the coccyx. Although in very rare cases babies may be born with a vestigial tail, these remains are usually surgically removed without major complications, showing that we evolved from ancestors with tails.
3. Wisdom tooth
With the development of the human diet and the resulting decrease in jaw size, wisdom teeth often do not have room to emerge, which can cause dental problems. Its benefit diminished when we changed our eating habits to softer foods.
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4. The nictitating membrane (flexor semilunar)
This small remnant in the corner of the human eye is all that remains of the nictitating membrane, the “third eyelid” found in other animals to protect the eye. Although it no longer has a clear function in humans, it serves as a reminder of our connection to other species.
5. Auricular muscles
Humans have small muscles around their ears, which, in other animals, help move the ears to better pick up sounds or express emotions. In most of us, these muscles are inactive, indicating that we have adapted other ways of identifying sounds and communicating emotions.
6. Palmaris longus muscle
This muscle, whose presence varies between individuals, may have actually been useful to our ancestors for climbing or other activities. Today, its absence does not affect hand function, and it is often used in surgical procedures as a graft source.
7. Pyramidal muscle
The pyramidal muscle is located in the lower abdomen, and may or may not be present in different people. Its function is uncertain in modern anatomy, and it may have played a more important role for ancestors with different postures or lifestyles.
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