The Endocrine System

The endocrine system is made up of several glands that secrete hormones into the bloodstream. The blood carries the hormones around the body and each hormone acts on a target organ, which produces an effect.

Compared to the nervous system, the effects of hormones are much slower but tend to be more long-lasting.

GlandHormone produced
PituitaryMany hormones, including anti-diuretic hormone (ADH), follicle-stimulating hormone (FSH) and luteinising hormone (LH)
PancreasInsulin and glucagon
OvaryOestrogen and progesterone

Pituitary Gland

The pituitary gland, located in the brain, is often referred to as a ‘master gland’ because it can secrete many hormones into the blood. These hormones act on other glands, causing other hormones to be released. So the pituitary gland can trigger a range of effects in the body.