Answer
Apart from the main endocrine glands --pituitary, gonads, thyroid,
hypothalamus, adrenals, pineal gland and thymus, there are many other structures/organs that produce hormones. This latter group includes the placenta, gastrointestinal tract (GI), kidneys, heart, adipose tissue, and skin. The hormones they produce are listed as follows:
Work Step by Step
GI organs produce gastrin, secretin, cholecystokinin (CCK), and glucose dependent insulinopeptide (GIP)
The hormones secreted by the plancenta include estrogen, progesterone, relaxin, human chorionc gonadotropin (hCG), and human somatmammotropin (hCS).
Some of the kidney hormones are relaxin, erythropoietin, and cacitriol (Vit. D).
Cardiac atria secrete atrial natriuretric peptide; fats synthesize leptin; and the skin elaborates cholecalciferol and androstenedione.
