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Body Systems › ViewWhat is the main function of the respiratory system?
A. to provide oxygen and remove carbon dioxide from the body
B. to bring oxygen to the body
C. to break down food and absorb nutrients
D. to remove oxygen from the body and deliver carbon dioxide
Living Organisms & Animal Behaviors › View
The scent of food is an example of a (an) ____ stimulus.
A. innate
B. external
C. internal
D. habitual