Tissue repair is the process that replaces worn out, damaged, or dead cells. Epithelial cells are replaced by the division of stem cells or undifferentiated cells Not all connective tissue cells have the ability to repair Muscle cells can perform limited repair Some nervous cells can perform limited repair, others cannot Fibrosis is the formation of scar tissue
Aging
Younger bodies generally experience: A better nutritional state A better blood supply to tissues A faster metabolic rate
Aging slows the process of tissue repair
Disorders
Disorders of epithelial tissues tend to be specific to individual organs Skin cancer Disorders of connective tissues tend to be autoimmune in nature Lupus Disorders of muscular and nervous tissues will be discussed in later chapters
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