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Critical Questions 1 & 2
1. With a serve knee injury you can expect a slow recovery because cartilage heals slowly it lacks the blood supply necessary for the healing process.
2. The skin is subjected to almost constant friction, which wears away the surface cells, and is charged with preventing the entry of damaging agents and with preventing water loss from the body. A stratified squamous epithelium with its many layers is much better adapted to stand up to abrasion than is simple epithelium; also the stratified epithelia regenerate more efficiently. Keratin is a tough waterproofing protein that fills the bill for preventing desiccation and acting as a physical barrier to injurious agents.