the endocrine system

• what are hormones?


  chemical molecules released into the blood

  they control things in the organs and cells that need constant adjustment
• what does the pituitary gland do?

  produces hormones that regulate body conditions
• what do ovaries produce?

  oestrogen
• what do the testes produce?


  testosterone - this controls puberty and sperm production
• what does the thyroid produce?

  thyroxine - regulates things like heart rate
• what does the adrenal gland produce?

  adrenaline - prepares the body for 'fight or flight' response
• what do the pancreas produce?

  insulin - regulates blood glucose level
• what's the differences between nerves and hormones?

  hormones are slower and act for a long time in a more general whereas as nerves are the opposite