Here's why:
* Epithelial tissue is a type of tissue that covers the surfaces of the body, lines internal organs, and forms glands.
* Endocrine glands are specialized epithelial tissues that secrete hormones directly into the bloodstream. These hormones then travel throughout the body to target cells and tissues.
While other types of tissue can produce hormone-like substances, endocrine glands are the primary producers of hormones that regulate various bodily functions.