MICROANATOMY

Detailed explanation-1: -The endocrine glands do not have ducts to carry their product to a surface. They are called ductless glands. The word endocrine is derived from the Greek terms “endo, ‘’ meaning within, and “krine, ‘’ meaning to separate or secrete.

Detailed explanation-2: -Glands without ducts are called “ductless” or “endocrine” glands. They release their secretions directly into the bloodstream. Pituitary is the master endocrine gland which regulates the secretions of other endocrine glands such as pancreas, thyroid gland, gonads, adrenal gland, etc.

Detailed explanation-3: -Endocrine glands do not have ducts. This allows the hormones to act over long distances. The hormones are able to reach any target organ that it needs to act on. The glandular epithelium that secrete substances through ducts are called exocrine glands.

Detailed explanation-4: -The sublingual gland differs from the other major salivary glands, because it lacks intercalated or striated ducts, so the saliva secretes directly through the ducts of Rivinus.

Detailed explanation-5: -lacrimal gland, thyroid gland, liver, sweat gland in skin, pituitary gland, gastric glands, adrenal gland, salivary gland.