Which part of the human body Cannot heal itself?

The human body is an amazing thing. It can repair itself from almost any kind of injury or trauma it sustains — with the exception of one type of injury: nerve injury. Nerve tissue is unable to replicate (epithelial tissue) or hypertrophying (connective tissue) to repair damage. So, what part of the human body cannot heal itself?

The answer is teeth. Teeth are the only bodily component that cannot be repaired by the body. Repairing means either regrowing what was lost or replacing it with scar tissue — and sadly, teeth are unable to do either of these. Our brain, for example, will not regrow damaged brain cells but can repair an area by laying down other scar-type tissue.

The acid in the stomach, vagina, and other organs can act as part of the non-specific immune system, creating an environment in which potentially invasive organisms cannot survive. The cells involved in this process, such as phagocytes, are responsible for eating cells and other substances to create the environment mentioned above.

Organs like our skin — which is the body’s biggest organ — must regenerate often, according to Curiosity Kids. The stem cells in the skin produce new cells when the old ones are lost — such as when a person gets a paper cut.

The only other human organ that can heal itself is the liver, which regenerates a portion of itself when damaged — such as when a person consumes too much alcohol. Liver cells reproduce to mimic the existing cells found in the liver, and this healing process begins almost immediately.

The human brain and spinal cord, as well as related tissues, are unable to regenerate because the cells in the area are not capable of dividing — unlike the liver. Other parts of the body that cannot regenerate include cartilage, cardiac muscle, skeletal muscle, and the lens of the eye.

While it may be possible to speed up the healing process in some areas of the body — such as through exercise and meditation — some parts of the body cannot heal themselves regardless of what we do. These include teeth, the brain, and the lens of the eye.

It is important to remember that if you are suffering from an injury or illness, you should always seek professional medical advice. There is no one-size-fits-all solution when it comes to healing and what works for one person might not work for another.

Whatever your medical situation, understanding how our body works — including which parts of the body can and cannot heal themselves — is an important part of taking control of your health and wellbeing.