Editing Endocrine system (section)

===Major endocrine systems===
The human endocrine system consists of several systems that operate via [[feedback loop]]s. Several important feedback systems are mediated via the [[hypothalamus]] and pituitary.<ref>{{Cite book |title=Human Physiology: From Cells to Systems |url=https://archive.org/details/humanphysiologyf00sher |url-access=registration |author=Sherwood, L. |publisher=Wadsworth Pub Co |year=1997 |isbn=978-0-495-39184-5}}</ref>
* [[Hypothalamic–pituitary–thyroid axis|TRH – TSH – T3/T4]]
* [[Hypothalamic–pituitary–gonadal axis|GnRH – LH/FSH – sex hormones]]
* [[Hypothalamic–pituitary–adrenal axis|CRH – ACTH – cortisol]]
* [[Renin–angiotensin system|Renin – angiotensin – aldosterone]]
* [[Energy homeostasis|Leptin vs. ghrelin]]