Table of Contents
What is the replacement of dead or damaged cells by the same type of cells as before called?
Regeneration is the addition of new cells of the same type as the ones that were injured (Figure 1). Figure 1. Tissue Healing. During wound repair, collagen fibers are laid down randomly by fibroblasts that move into repair the area.
Is the substitution of viable cells for dead cells?
Tissue repair is the substitution of viable cells for dead cells, and it can occur by regeneration or replacement. In regeneration, the new cells are the same type as those that were destroyed, and normal function is usually restored.
What is the difference between regeneration and fibrosis?
The repair process typically involves two distinct stages: a regenerative phase, where injured cells are replaced by cells of the same type, leaving no lasting evidence of damage; and a phase known as fibroplasia, or fibrosis, where connective tissue replaces normal parenchymal tissue.
What is resolution regeneration and replacement?
After removal of cellular debris, any necrotic parenchymal cells may be replaced by new parenchymal cells of the same type in a process known as regeneration. When resolution and regeneration are not possible, necrotic cells are replaced with collagen; this is termed organization, or repair by scar formation.
What is the difference between healing and regeneration?
Wound healing, a key property of epithelia, involves tissue closure that in some cases leads to scar formation. Regeneration, a process rather limited in mammals, is the capacity to regrow (parts of) an organ or a tissue, after damage or amputation.
What type of tissue replaces damaged tissue during fibrosis?
Fibrosis, also known as fibrotic scarring, is a pathological wound healing in which connective tissue replaces normal parenchymal tissue to the extent that it goes unchecked, leading to considerable tissue remodelling and the formation of permanent scar tissue.
How do new cells replace old cells?
When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.