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Unformatted text preview:within neural tissue that support, nourish, and protect neurons. 3) Which is likely to heal faster, a bone injury or a cartilage injury? Why? Bone injuries heal relatively quickly because of the good nutrient supply by way of nearby blood vessels and the canaliculi, whereas cartilage is supplied nutrients via diffusion from the outside, a far slower process. 4) Indicate an advantage for having simple rather than stratified epithelium lining the gas-exchange surfaces of the lungs. The epithelia are thin, keeping diffusion distance between blood and airspaces to a minimum. This speeds gas exchange across the layers.