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The liver and pancreas are both exocrine and endocrine glands; they are exocrine glands because they secrete productsâ bile and pancreatic juice âinto the gastrointestinal tract through a series of ducts, and endocrine because they secrete other substances directly into the bloodstream.
There are two major components of any exocrine gland: Parenchyma, which is the epithelial component of the gland consisting of the secretory units and ducts. Stroma, which is the connective tissue component of the gland (for support), as well as blood vessels and nerves.