Biology::Procces of Tissue Repair

Procces of Tissue Repair

by Jonathan Ortega & Sueli Skinner

Tissue: Definition
A tissue is a group of cells that usually have a common embryonic origin and function together to carry out a specific task. Structure and properties of tissues are influenced by the extracellular fluids around the cells and types of cell junctions that are present. The study of tissues is called Histology.

žTissue Repair
Epithelial tissues and most connective tissues have a continuous capacity for renewal. In some instances, undifferentiated cells called Stem Cells divide and replace lost and damaged cells. Stem cells are found in protected locations in the skin and gastrointestinal tract. Stem cells in bone marrow continually provide red and white blood cells. Stem cells called satellite cells are present in muscle tissue, but they divide too slowly for tissue repair. Smooth muscle cells may proliferate, but still too slowly for replacement of damaged tissues. Stem cells in brain tissue generally do not undergo mitosis to replace damaged tissue.

žScars sometimes result as tissues repair themselves. The process of scar tissue formation is called Fibrosis. Adhesions result from abnormal joining of tissues by scar tissues. Extreme adhesions developing after an injury may actually interfere with a tissue or organ’s ability to function properly.

žProper nutrition, blood circulation, and age may affect the rate of tissue repair. Healing processes place extra demands upon the body, so proper nutrition is vital to the healing process. Adequate protein must be present in the diet, and vitamins are essential for wound healing.

ž Vitamin A is essential for replacement and healing of epithelial tissues. B-vitamins are needed by cellular enzyme systems, and Vitamin C is essential for production and maintenance of collagen and development of new blood vessels. Vitamin D is needed for bone healing and formation, and Vitamin K is essential in the blood clotting process. Vitamin E may help prevent some types of tissue scar

Tissue Reapair Procces in an inflamation (Flash Animation)