<P> Exocrine glands are glands that produce and secrete substances onto an epithelial surface by way of a duct . Examples of exocrine glands include sweat , salivary , mammary , ceruminous , lacrimal , sebaceous , and mucous . Exocrine glands are one of two types of glands in the human body , the other being endocrine glands , which secrete their products directly into the bloodstream . The liver and pancreas are both exocrine and endocrine glands ; they are exocrine glands because they secrete products -- bile and pancreatic juice -- into the gastrointestinal tract through a series of ducts , and endocrine because they secrete other substances directly into the bloodstream . </P>
where do the secretory cells of endocrine glands secrete their products
bloodstream