Final answer:
Endocrine glands release hormones into the bloodstream, while exocrine glands secrete their substances through ducts onto body surfaces or into cavities.
Step-by-step explanation:
Endocrine and exocrine glands are two types of glands in the body that secrete different substances and function differently.
Endocrine glands release hormones directly into the bloodstream and do not have ducts. Examples of endocrine glands include the pituitary gland, thyroid gland, and adrenal glands. These hormones travel through the bloodstream to target cells or organs, where they regulate various bodily functions.
Exocrine glands, on the other hand, release their secretions through ducts onto the body's surfaces or into body cavities. Examples of exocrine glands include sweat glands, salivary glands, and tear glands. These secretions are not hormones but substances like sweat, saliva, and tears that serve specific functions, such as cooling the body, aiding in digestion, or lubricating the eyes.