Human Hormones

Amine Hormones:

Catecholamines:
1 Dopamine
2 Epinephrine
3 Norepinephrine

Tryptophan Derivatives:
1 Melatonin
2 Serotonin
Tyrosine Derivatives:
1 Thyroxine
2 Triiodothyronine

Peptide hormones:

1 Adiponectin
2 Adrenocorticotropic Hormone
3 Amylin
4 Angiotensinogen and Angiotensin
5 Arginine Vasopressin
6 Antimullerian Hormone
7 Atrial-Natriuretic Peptide
8 Calcitonin
9 Cholecystokinin
10 Corticotrophin-Releasing Hormone
11 Enteroglucagon
12 Erythropoietin
13 Follicle-Stimulating Hormone
14 Gastrin
15 Ghrelin
16 Glucagon
17 Glucose-Dependant Insulinotropic Peptide
18 Gonadotropin-Releasing Hormone
19 Growth Hormone-Releasing Hormone
20 Human Chorionic Gonadotropin
21 Human Placental Lactogen
22 Inhibin
23 Insulin
24 Insulin-Like Growth Factor
25 Leptin
26 Luteinizing Hormone
27 Melanocyte Stimulating Hormone
28 Neuropeptide Y
29 Oxytocin
30 Parathormone
31 Prolactin
32 Relaxin
33 Secretin
34 Somatostatin
35 Somatotropin
36 Thrombopoietin
37 Thyroid-Stimulating Hormone
38 Thyrotropin-Releasing Hormone
39 Vasoactive Intestinal Peptide

Steroid Hormones:

Glucocorticoids:
1 Cortisol
Mineralocorticoids:
2 Aldosterone
Androgens:
3 Androstenedione
4 Dehydroepiandrosterone
5 Dehydroepiandrosterone sulfate
6 Dihydrotestosterone
7 Testosterone
Estrogens:
8 Estradiol
9 Estriol
10 Estrone
Progestagens:
11 Progesterone 

Sterol Hormones:

Vitamin D Derivatives:
1 Calcitriol
Lipid hormones:
2 Leukotrienes
3 Prostacyclin
4 Prostaglandins
5 Thromboxane

The concept of internal secretion developed in the 19th century; Claude Bernard described it in 1855, but did not specifically address the possibility of secretions of one organ acting as messengers to others. Still, various endocrine conditions were recognized and even treated adequately.

The major breakthrough was the identification of secretin, the hormone secreted by the duodenum that stimulates pancreatic secretions, by Ernest Starling and William Bayliss in 1902. Previously, the process had been considered to be regulated by the nervous system. Starling and Bayliss demonstrated that injecting duodenal extract into dogs rapidly increased pancreatic secretions, raising the possibility of a chemical messenger.

Starling is also credited with introducing the term hormone, having coined it in a 1905 lecture. Later reports indicate it was suggested to him by the Cambridge physiologist William B. Hardy.

The remainder of the 20th century saw all the major hormones discovered, as well as the cloning of the relevant genes and the identification of the many interlocking feedback mechanisms that characterize the endocrine system.