GENERAL HISTOLOGY

Detailed explanation-1: -Introduction to Glandular Tissue Glands are organized arrangements of secretory cells. All exocrine glands (and also most endocrine glands), are composed of epithelial tissue.

Detailed explanation-2: -MOST OF THE ENDOCRINE GLANDS ARE EPITHELIAL DERIVATIVES. Endocrine glands are formed by invagination from an epithelial sheet and initially have ducts connecting them to the free surface of the epithelial sheet. During embryonic development, they will lose their ducts and thus are called ductless glands (No ducts).

Detailed explanation-3: -The pancreas is an abdominal organ possessing both endocrine and exocrine functions. It produces a variety of hormones that mostly pertain to regulating blood sugar levels. As an exocrine gland, it secretes pancreatic fluid that contains bicarbonate and digestive enzymes.

Detailed explanation-4: -Moreover, glandular epithelium can be found as a secretory sheet of cells lining the inside of an entire organ, such as the stomach. Finally, glandular epithelium can also be found within endocrine glands, which are the ductless glands that secrete hormones into the blood.