1. Appendix
The most useless organ we know is the appendix, which is not only useless but also easy to cause appendicitis and abdominal pain. Acute appendicitis may lead to death.
First of all, there is a difference between appendix and human cecum. The cecum is the starting point of the large intestine behind the small intestine, which prevents food from entering the large intestine quickly and affects absorption. The appendix is outside the cecum, and its length varies from person to person. As you get older, the appendix will shrink until it can no longer be found.
Secondly, modern research has found that the appendix has a certain immune function in the human body and belongs to the immune organ of the human body. However, the appendix is prone to pathological changes, such as pain in the right lower abdomen, nausea, vomiting, diarrhea and abdominal distension. May be appendicitis, appendicitis accounts for more than 90% of acute abdominal pain.
These organs in the human body are redundant.
Therefore, the appendix is prone to pathological changes, and its effect on the body is greater than the harm it brings.
2. Men's breasts
Men's breasts are of little physiological use. Compared with women, male breasts are only less stimulated by estrogen and have no development. Under normal circumstances, a man's breasts can't be breastfed except for decoration.
But men also suffer from breast cancer because of their breasts, accounting for 1% of breast cancer patients. In addition, the occurrence of breast cancer is closely related to estrogen, so male breast cancer mostly occurs in men aged 60-70. During this period, androgen is reduced, relative estrogen is not inhibited, and other factors are easy to cause breast cancer.
A man's breast is different from other tissues of the body. Even if it is useless, it should not be removed under normal circumstances.
hircus
Adult men and women are prone to armpit hair. In our understanding, armpit hair is of little use. If studied deeply, armpit hair can prevent bacteria from contacting the skin and reduce friction.
First, absorb and shield foreign bacteria and reduce the harm of bacteria to axillary lymph. Secondly, the position where armpit hair grows can reduce the friction of surrounding skin.
However, armpit hair can also bring a lot of harm. Once you sweat, your armpits will get wet, breeding bacteria and smells. In addition, while protecting the skin, armpit hair can also absorb and block external bacteria. If you don't pay attention to cleaning, it will lead to bacteria themselves and cause skin problems.
4. Tonsils
As long as you have a cold and cough, the doctor will definitely ask if your throat hurts, and let the patient open his mouth to observe his throat. Actually, this is looking at the tonsils.
Tonsils are a pair, belonging to the lymphatic system of human body. They can produce lymphocytes and antibodies, so they can resist viruses and bacteria. But the tonsils are in the throat, which is the only way for food and air to enter the human body. Moreover, its surface is easily uneven, and its crypt is easily polluted by bacteria, hiding bacteria and viruses.
Once the body's resistance drops, it is easy to be attacked by bacteria and viruses, causing inflammation, such as fever, sore throat and redness of the throat.
Therefore, the tonsils in the mouth are not very useful to the human body. If it is easy to be infected, you can consider excision.
5. Real teeth
"True teeth" do not refer to all the teeth in the mouth, but wisdom teeth, which are often referred to as real teeth in Chinese medicine. The growth of teeth seems to be influenced by kidney qi, so when the woman Sanqi and her husband were 38 years old, real teeth appeared and grew together.
Modern medicine believes that wisdom teeth belong to the residue of human evolution and generally have four wisdom teeth. With the evolution of human beings, many people no longer have wisdom teeth or can't fully grow them.
Even so, wisdom teeth will still bring harm to the oral cavity, because the end of alveolar bone is difficult to clean, and it is easy to cause oral diseases such as dental caries and periodontitis. Therefore, real teeth do not have much effect, but will bring oral diseases.
6. Long hair
Hair is not an organ of the human body, so it has no nervous system, blood vessels and human cells, and even if it is lost, it will not cause pain. Modern people's hair plays the role of decoration, keeping warm and reducing collision, and it is also a way to observe human health.
But too long hair is of little use to the human body, but it is easy to hide bacteria. Moreover, many people choose to dye their hair for beauty, which will bring more harm. So don't make your hair too long, it's not good for your health.
Conclusion: The human body has 206 bones, 639 muscles and 9 metabolic and circulatory systems that manage the body. These are all tissues that make up the human body, but after all, not all human organs or tissues are useful to the body. Some tissues or organs are not only useless, but also bring many diseases to the body. Do you know what your body has gone through? Do we know this place?