According to the experts, the humans have been developing for the past 200,000 years, and many tiny changes have led to our current form. Well, ladies and gentlemen, this means that we (today) are a product of adaptation, evolution, and natural selection. Even though our ancestors may have looked similar in appearance to us, many physical and anatomical things are different these days. Proof of this can be found in the vestigial structures scattered throughout our bodies.
What are vestigial structures? We can answer that question for you – they are genetically determined structures or attributes that have apparently lost most or all of their ancestral function in a given species, but having been retained during the process of evolution.
The experts say that the best known examples of vestigial structures include the appendix, goosebumps, wisdom teeth, tonsils, male nipples, and the outer ear. Just take a look at the article below and find out more about this.
- The tendon on your wrist
Here’s what you need to do – first, you need to put your hand on the table with palms upwards. Connect your thumb and little finger together and raise your fist a little. In some people the tendons will be clearly visible, while in others will be less visible.
This is due to the palmaris longus tendon muscle which is located between the upper arm and wrist. Although this muscle takes part in the movement of the wrist, in the modern age is no longer needed and therefore it is noticeable in just 13% of today`s human population.
Moreover, the lack of this muscle will not affect the strength and has no adverse effects, except visually.
- The pink point in the corner of your eye
Can I ask you a simple question – have you noticed a pink point in the corner of you eyes? Well, generally speaking, almost all people have this point which nowadays has no function, but it is characteristic of the so-called – the third eyelid. This eyelid is usually found in reptiles which serves as a protection of the eye when their eyes are closed.
- Wiggling ears
Some people wiggle their ears just for fun. But, you’ll be amazed when we tell you that the wiggling muscles in the ears had a very important role in the past. Wiggling your ears can improve the hearing and enable people to locate sounds in the environment and recognize danger. Note: this is common in cats.
- Wisdom tooth
Yes, some people have wisdom teeth and some people don`t. Ladies and gentlemen, a long time ago, the humans fed in grass roots. And today, our food became softer and lighter, and our jaw became smaller and the wisdom teeth lost their function. Most monkeys and primates have no wisdom teeth, while gorillas which are vegetarians still have them.
- Getting goosebumps
We all know that goosebumps usually appear when people are cold or when they experience powerful emotions. So, what happens – well, when the hair is up, it stores more heat, and when in danger, it served to make people bigger and more dangerous for potential attackers. This is visible in domestic cats and other animals.