* Nervous tissue: The neurons in the brain and spinal cord have very limited ability to regenerate. While some peripheral nerves can regenerate, damage to the central nervous system is often permanent.
* Cardiac muscle: The heart muscle has very limited regenerative capacity. When the heart muscle is damaged, for example, due to a heart attack, the damaged tissue is often replaced by scar tissue, which does not function as well as the original muscle.
* Skeletal muscle: While skeletal muscle has some regenerative capacity, it is limited, especially with age.
It's important to note that regeneration capabilities can vary depending on the specific tissue and the extent of damage. However, these three tissues generally have very limited or no functional regeneration.
