a hormone is a chemical substance produced in minute quantities by an endocrine gland. It is transported in the bloodstream to target organs where it exerts its effects. Hormones are chemical messengers that help the various parts of the body to respond, develop and work together smoothly
hormones can influence the growth, development and activity of an organism
hormones are produced by ductless glands called endocrine glands
Pancreas
Both an endocrine and exocrine gland
the pancreas produces hormones and other secretions
the pancreas produces pancreatic juice, which is carried by the pancreatic duct to the duodenum
the pancreas also contains special groups of cells known as the islets of Langerhans which secrete the hormones insulin and glucagon into the bloodstream
Pituitary Gland
secretes hormones which control the secretion of hormones of other endocrine glands
