By getting compressed, the cushioning material absorbs some of the energy of the collision. This leaves less force to cause injury or damage.
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Similarities : used in circulatory system, transport materials, differences : arteries are thicker, and used to transport materials to the cells veins are thinner, and used to transport materials from the cells to areas of the excretory system.
insulation
Acid lining material used in inductor and basic lining material used in sheel
It all depends on how you define the word, collision. From a medical standpoint, there is a collision every time your foot hits the ground, while walking or running, for instance.