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Stack #2643676

exocrine glands use ducts to carry their chemical messengers: include sweat glands and the bite ducts.
endocrine glands are "ductless" and secrete hormones directly into the bloodstream to be carried to a target organ; most hormones are endocrine in nature.
neuro hormones a neurotransmitter that is secreted directly into the bloodstream type from neurons; affect the transmission of stimulus within the nervous
Created by: Holiver0114