hormones - Chemical messengers carried by the blood, pituitary gland - The name of the 'master gland' in the brain, thyroid gland - Butterfly shaped gland in the neck. Releases a hormone called thyroxine, adrenal glands - Release adrenaline, adrenaline - Coordinates the 'fight of flight' response, testosterone - The main reproductive hormones in males, oestrogen - The main reproductive hormone in females,

The endocrine system overview

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