Endocrine system observed in all animals with a nervous system and all vertebrates have an hypothalamus-pituitary axis. All vertebrates have a thyroid, which in amphibians is also crucial for transformation of larvae into adult form. All vertebrates have adrenal gland tissue, with mammals unique in having it organized into layers. All vertebrates have some form of a renin–angiotensin axis, and all tetrapods have aldosterone as a primary mineralocorticoid. Endocrine system The endocrine system is a chemical messenger system consisting of hormones, the group of glands of an organism that secrete those hormones directly into the circulatory system to regulate the function of
Endocrine surgery Endocrine surgery Endocrine surgery is a surgical sub-speciality focusing on surgery of the endocrine glands, including the thyroid gland, the parathyroid glands, the adrenal glands, glands of the endocrine pancreas, and some neuroendocrine glands. Surgery of the thyroid gland constitutes the bulk of endocrine surgical procedures worldwide. This may be done for a variety of conditions, ranging from benign multinodular goiter to thyroid cancer.In the United Kingdom it was developed as a separate speciality from general surgery at the Royal Postgraduate Medical School by Dick Welbourne and John Lynn. Operations involve removal of the thyroid gland (thyroidectomy) either as a