Our body is imperfect
Double function of pharynx
The fact that we use the same canal - the pharynx - for both eating and breathing, has cost the lives of millions of people in history who died from accidental suffocation while eating.
Inability to biosynthesis of vitamin C
Vitamin C is vital - it plays an important role in the synthesis of collagen, and is also an antioxidant. However, the organisms of humans (as well as primates, guinea pigs, certain species of bats and birds) have lost the ability to produce it independently and are forced to consume from the outside. The lack of vitamin C leads to a weakening of immunity and, in especially severe cases, to scurvy.
An uncomfortable urinary tract in men
Urinary tracts in the body of a man pass through the prostate gland instead of bending around it - as a result, swelling of the canal (for example, due to inflammation) blocks sexual function.
Immediate proximity of genital organs and rectum outlet
This "neighborhood" is "uncomfortable and unhygienic and leads to the spread of urinary tract and bladder infections, especially in women (remember, ladies, from front to back).
Multifunctionality of our genitals
The use of the same organs for the removal of waste and reproduction, perhaps, is justified from the point of view of design, but it gives a lot of trouble during operation. For example, during the sexual act, bacteria can enter the urethra, which leads to infections of the genital tract, chlamydia, microplasmosis, and much more.
Very narrow channel of childbearing
The birth of women is very painful - and all because mother nature has given the female a man too narrow a birth canal. In addition to unpleasant sensations, this feature of anatomy increases the risks of birth injuries to the mother and child. Apparently, the excessive narrowness of the birth canal is a consequence of the rapid evolutionary leap of man from the quadruplet to the bipedal.
Evolution gave a man a straightforwardness-and straightness rewarded him with problems with his back. Paleontologist Bruce Latimer explains: "When people began to move vertically, their spine evolved to become more rigid and adapted, for example, climbing trees and rocks. However, in order to keep the body above the loin in a straight position, to hold the head and not to impede procreation, the spinal column should not be straight, but curved forward, as in lordosis, that is, have a 3-shaped shape. All that people wear above the waist creates pressure on the spine, which leads to stoop, curvature, chronic fatigue and pain in the back. Even if it is very good to take care of your back, the spine can function without problems for 40-50 years. "
Excessive complexity of the device of human legs
Anthropologist Jeremy DeSilva of Boston University says: "Our feet contain so many." Because it was necessary for our primordial primates to move around the branches of trees, but since we climbed off the trees "and began to move around firm ground, the foot changed to become more stable. The thumb stopped opposing the rest of the fingers and the arch of the foot began to work as a shock absorber. However, the problem is that in the legs there are still too many moving parts and ligaments, whose role in the movement of modern man is not too important. As a consequence, we have such "pleasant" things as stretches of the ankle joint, plantar fasciitis, broken ankles, etc.
Knees is also not very
The reason is the same - overload due to strabismus, which complicates the functioning of the knee joints. We are forced to distribute our weight in just two limbs, which leads to pain and arthritis.
Just one set of teeth
You have only one set of teeth for life, and according to statistics you can keep it in its entirety for a maximum of up to 35 years. The teeth are not updated - another proof that evolution has assigned people only one basic function: the birth of children and (rather short ) a period of care for them. And nothing more.