endocrine system

• Pituitary gland

  • This is the main endocrine gland or "master gland".
  • It is found in the brain and is linked to the hypothalamus (part of the brain that receives signals from receptors).
  • The pituitary gland releases hormones in response to changes detected by the hypothalamus. 
  • Lots of these hormones trigger other glands to release more hormones.
• The endocrine system coordinates the body’s response to changes in the environment using chemical messengers (hormones). Hormones are released by glands into the bloodstream, where they travel to target organs.
• • The testes produce testosterone, which controls puberty and sperm production.
• The ovaries produce oestrogen, which controls puberty and is one of the main hormones in the regulation of the menstrual cycle
• The two adrenal glands are situated above each kidney. They produce adrenaline, which triggers the ‘fight or flight’ response when an organism is presented with a dangerous situation.
• The pancreas produces insulin and glucagon, both of which are involved in regulating blood glucose levels.
• This gland is in our neck and releases thyroxine. Thyroxine regulates our metabolism, heart rate and temperature.