It releases the sweat through a duck and onto our skin so onto our external environment. So this is basically exocrine glands but endocrine glands are found in the endocrine system. Now, before we discuss the different types of hormones that are produced by the endocrine glands. Let's discuss the three ways by which our cells can basically communicate with one another using chemicals, using molecules. Now we basically have an autocrine signaling pathway, we have a paracrine signaling pathway and we have the endocrine signaling pathway that is used by the endocrine system. Now an autocrine signaling basically means that our cell produces some type of chemical.