The human body contains a huge range of cells ~ over 300 different types. Some divide often through life, others divide only infrequently and some do not divide at all after birth.
The most actively dividing cells are found in areas of the body that receive a lot of wear and tear. The cells in the living layer at the base of the skin divide often to replenish the cells of the skin that are lost all the time. The skin is the barrier of the body that protects it from injury and prevents the entry of dangerous substances and microorganisms. It is tough and constantly renewed.
The cells that line the digestive system, particularly the intestines are also amongst the rapid dividers. The constant movement of food through the digestive system causes cells to be damaged and lost and constant repair is necessary.
Cells in organs such as the heart do not divide in the adult, except in cases where disease or trauma causes damage. Cells in the nervous system and the brain do not divide after birth, which is why an injury to the spine is usually irreversible.
The most actively dividing cells are found in areas of the body that receive a lot of wear and tear. The cells in the living layer at the base of the skin divide often to replenish the cells of the skin that are lost all the time. The skin is the barrier of the body that protects it from injury and prevents the entry of dangerous substances and microorganisms. It is tough and constantly renewed.
The cells that line the digestive system, particularly the intestines are also amongst the rapid dividers. The constant movement of food through the digestive system causes cells to be damaged and lost and constant repair is necessary.
Cells in organs such as the heart do not divide in the adult, except in cases where disease or trauma causes damage. Cells in the nervous system and the brain do not divide after birth, which is why an injury to the spine is usually irreversible.
