Description:
This page of Hyperphysics, from Georgia State University, uses elasticity to explain why a baby needs help--like a smack on the bottom--to take its first breath and also why people with emphysema have so much difficulty exhaling. Another section explains why capillaries can be extremely thin, whereas large arteries must have strong, thick walls. A third section describes the physics of the aneurysm, a bulge in the walls of a larger artery.
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