The heart secretes atrial natriuretic peptide, which acts on the kidneys. Oxytocin is secreted by the posterior pituitary. Thymosin is secreted by the thymus gland. Androgens are secreted by the adrenal cortex. 

The adrenal medulla produces epinephrine and norepinephrine, which cause the fight or flight response. The thyroid gland produces triiodothryonine and thyroxine, which are used for metabolism, growth, and development. The ovaries and placenta produce estrogen and progesterone, which are used for fetal/maternal development and egg production. Lastly, the stomach and small intestines produce gastrin and secretin, which are used to assist digestion and nutrient absorption.

Adipose tissue secretes leptin, adiponectin, and resistin which affect food intake, metabolism, and reproduction. The thymus gland is responsible for secreting thymosin and thymopietin. Ovaries and the placenta secrete estrogen and progesterone. The adrenal medulla secretes epinephrine and norepinephrine. 

The hormones secreted by the alpha and beta cells of the pancreas are glucagon and insulin, respectively. These hormones are associated with the metabolism glucose. Glucagon increases blood glucose levels, while insulin does the opposite. Follicle-stimulating hormone is responsible for egg or sperm development. Tropic hormones from the hypothalamus are what release or inhibit pituitary hormones. Lastly, thymosin and thymopoietin are what regulate blood calcium and phosphate levels. 

The liver secretes angiotensinogen and insulin-like growth factors. Only angiotensinogen is responsible for increasing blood pressure by acting on blood vessels. Cortisol is released by the adrenal cortex, oxytocin is released by the posterior pituitary, and vitamin D3 is found being activated in the skin. Angiotensinogen is a zymogen that is converted into angiotensin I by renin (secreted by the kidney). Then angiotensin converting enzyme (ACE) converts angiotensin I into angiotensin II, which is a potent vasoconstrictor. Angiotensin II also promotes the release of aldosterone from the adrenal cortex, which increases sodium reabsorption. Lastly, antidiuretic hormone (ADH) is released from the posterior pituitary to act on the distal convoluted tubule and the collecting duct to increase the permeability of water via upregulation of aquaporins. Together, these hormones act to increase blood pressure.

The adrenal cortex secretes androgens, cortisol, and aldosterone. The adrenal medulla is what secretes epinephrine. The kidney secretes erythropoietin. Lastly, the pancreas is what secretes insulin. 

The secretion of hormones of the anterior pituitary is stimulated or inhibited by releasing and/or inhibiting factors released from the hypothalamus into the hypophyseal portal system. 

Steroid hormones are synthesized from cholesterol. The amine hormones are synthesized from the amino acid tyrosine. Cortisol is an example of a steroid hormone, and is not a precursor for the synthesis of other steroid hormones.

The following are appropriate matches of adrenal layers to their corresponding secretory products: zona glomerulosa; aldosterone, zona fasciculata; cortisol and minor amount of androgens, zona reticularis; androgens, medulla; catecholamines. The layers of the adrenal glands, from superficial to deep are: capsule, zona glomerulosa, zona fasciculata, zona reticularis, medulla.  

Parathyroid hormone (PTH) is released when blood calcium levels are low, and functions to raise blood calcium levels via a negative feedback mechanism. It does this by increasing osteoclast activity and degrading bone to release calcium into the blood. It also increases absorption of calcium in the renal tubule, increases production of 25-hydroxyvitamin D3, and increases absorption of calcium in the intestines.