endocrine system

• What does the endocrine system do?

  -Major communication system used to control vital functions

  -Instructs glands to release hormones directly into the bloodstream, hormones are carried towards target organs in the body
• Similarities between endocrine & nervous system

  -Both are communication systems

  -Both are needed for vital functions
• Differences between endocrine & nervous system


  -Nervous system communicates electrically & chemically, endocrine system communicates via chemicals only

  -Nervous system is fast: neurons, endocrine system is slower: hormone
• Pituitary gland


  Controls several of the other hormone glands
• Melatonin hormones


  Released by pineal gland

  Helps body recognise when it is time to go to sleep
• Adrenalin hormone


  Released by adrenal gland

  Helps body to prepare for fight/flight in an emergency situation
• Thyroxine hormone


  Released by thyroid gland

  Responsible for regulating the body's metabolic rate & protein synthesis