Endocrine System and Hypothalamic-Pituitary Axis (HPA)

00:01 The general principle of the endocrine system and the hypothalamic pituitary axis.

00:08 Let's first start off by looking through some of the major components of the endocrine system.

00:16 The hypothalamus and the pituitary go together quite well.

00:20 The hypothalamus control many of the pituitary secretions.

00:24 These are both from the anterior and posterior pituitary.

00:28 The thyroid and parathyroid glands are going to be very important for releasing T3,T4 and parathyroid hormones.

00:37 The adrenal glands located just above the kidney as well as the pancreas, which have both an endocrine component and an exocrine component.

00:47 And finally the gonads for both the male and female all part of the endocrine system.

00:52 And let's talk through many of those different hormones individually.

00:59 There are a few other tissues in the body that do produce hormones.

01:05 And again a hormone is a signaling molecule that is put into the blood, travels around in circulations and binds to a target tissue.

01:14 Beside the major one, adipose tissue can serve as a place in which hormones are derived and secreted.

01:24 Leptin is the primary hormone here.

01:28 The heart produces a couple of hormones.

01:31 ANP Atrial natriuretic peptide and BNP Brain natriuretic peptide.

01:37 The kidney also produces some hormones.

01:39 Things like EPO Erythropoietin.

01:44 The liver participates in endocrine control by releasing insulin like growth factors.

01:51 And then the intestines and the stomach round it out as there are many different hormones released such as gastrin and secretin.

01:59 They're going to be very important in the digestive process but really only act pretty locally in the GI system.