Aa0model is a strategy map used to determine the impact a program or service could have on a community through analyzing its inputs, practices, outputs, and outcomes.

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Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Answer(d) they all send signals from the brain to the body through long axons in the vertebral column;

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