Exocrine cells are specialized cells that produce and secrete substances through ducts to external surfaces or into body cavities. These substances can include enzymes, mucus, and sweat. Common examples of exocrine glands include the salivary glands, sweat glands, and pancreas, which play essential roles in digestion and temperature regulation. Unlike endocrine cells, which release hormones directly into the bloodstream, exocrine cells transport their secretions through a network of ducts. This allows for targeted delivery of their products, such as digestive enzymes into the small intestine or sweat onto the skin's surface for cooling.