The endocrine system and fight or flight response

The endocrine system releases hormones and affects various parts of the body such as the organs and the heart

• Hypothalamus: stimulates and controls the release of hormones from the pituitary gland
• Pineal gland: releases melatonin, which is responsible for important biological rhythms including the sleep-wake cycle
• Pituitary gland: sometimes known as the 'master gland' because the hormones it releases  control and stimulate the release of hormones from other glands
• Thyroid gland: releases thyroxine, which is responsible for regulating the metabolism
• Adrenal gland…