Function of the Endocrine System

• Function of the endocrine system:

  • Provides a chemical system of communication within the blood stream to regulate the activity of cells and organs in the body
  • Slower than the nervous system but its effects are more widespread and powerful
  • Chemical messengers are hormones, these are released by the glands to regulate bodily functions
• Gland - Organ that releases hormones that regulate functions in the body
• Pineal gland - Melatonin: Regulating the sleep-wake cycle
• Adrenal gland - Adrenaline: Fight or flight response
• Pituitary gland (master gland) - Many different hormones, e.g. oestrogen: Many effects depending on hormone released
• Ovaries - Oestrogen and progesterone: Regulate the menstrual cycle
• Testes - Testosterone: Male characteristics and production of sperm