The glands that produce secretions released through passageways onto an epithelial surface are

Answer;

-Exocrine glands

Explanation;

Exocrine glands produce exocrine secretions which are discharged onto an epithelial surface. Most exocrine secretions reach the surface through tubular ducts, which empty onto the skin surface or onto an epithelium lining an internal passageway that communicates with the exterior. Example; perspiration on the skin, tears in the eyes.

answer: blah

explanation:

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"d.) carbon dioxide and hydrogen sulfide"