Knowra Regeneration (biology) Regeneration (biology) Regeneration is the regrowth or replacement of lost or damaged body parts in living organisms. It ranges from tissue repair to rebuilding complex structures such as limbs.
Blastema : A mass of proliferating cells that forms at an injury site and can generate tissues during regeneration. Salamander limb regrowth proceeds through a blastema that supplies cells for rebuilding the missing structures.
Axolotl : A salamander that retains juvenile traits and can regenerate limbs, spinal cord, and several organs. Its limb regeneration is among the best-studied examples of rebuilding a complex structure.
Wound healing : The biological response that closes and repairs tissue after injury. Healing can restore a barrier while producing a scar instead of the original structure.
Regenerative medicine : A field that develops methods to repair, replace, or regenerate damaged cells, tissues, and organs. Research on natural regeneration guides strategies for restoring human tissues.
Regenerative capacity : The extent to which an organism or tissue can restore structures after loss or damage. Capacity varies sharply among species, organs, and stages of life.
Stem cell : An undifferentiated cell capable of self-renewal and producing one or more specialized cell types. Stem cells replenish specialized cells in some regenerative tissues, including blood and intestinal lining.
Hydra : A small freshwater cnidarian capable of regenerating a complete body from tissue fragments. Hydra demonstrates whole-body regeneration from a comparatively simple body plan.
Fibrosis : The excessive accumulation of connective tissue that can distort or impair an organ. Fibrosis often replaces damaged tissue with scar, limiting functional regeneration.
Tissue engineering : The design of biological substitutes that restore, maintain, or improve tissue function. Engineered scaffolds and cells aim to recreate conditions that support organized tissue growth.
Immune system : The cells, tissues, and molecules that defend an organism and regulate responses to damage. Immune signals can either support tissue rebuilding or promote scarring.
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