MICROANATOMY

Detailed explanation-1: -In June 1905, Ernest Starling, a professor of physiology at University College London, UK, first used the word ‘hormone’ in one of four Croonian Lectures-’On the chemical correlation of the functions of the body’-delivered at the Royal College of Physicians in London.

Detailed explanation-2: -The name hormone comes from the Greek word hormao meaning “I excite” and refers to the fact that each hormone excites or stimulates a particular part of the body known as the target gland. Hormones are made in endocrine glands and passed from the cells of the gland directly into the blood flowing through the gland.

Detailed explanation-3: -The first defined hormone and its discovery In 1902, William Bayliss and Ernest Starling found that in response to the delivery of acidic fluid from the stomach to the intestine, secretin, an internal secretion, was released into the blood from the endocrine cells of the duodenum.

Detailed explanation-4: -The role of estrogen was first accurately described in Guinea pigs in 1917 by Dr. Papanicolaou.