The cells or groups of cells that secrete the chemical substances necessary for various biological processes in the body are called glands. The glands of the human body are of two types. Exocrine gland and Antakshara gland.
1. Exocrine Glands: The chemical substances secreted from the ducted glands are transported through the ducts to the nearby parts of the body and are active are called exocrine glands. For example – salivary gland, liver gland, pancreas etc.
2. Endocrine glands: Chemical substances secreted from ductless glands are carried through the blood or lymph to distant specific organs of the body and are active, they are called endocrine glands.