The endoctrine system

• What are hormones and where are they secreted from?

  • Hormones: Chemical messengers
  • Secreted from: Endocrine glands
• What does 'secreted' mean?

  Given out
• How do hormones travel to their target organ?

  In the bloodstream
• Which gland is found in the brain?

  Pituitary gland
• Why is the pituitary gland called the master gland?

  It controls hormone release from other glands
• Compare the nervous and endocrine systems.

  • Nervous System:
  • Fast acting
  • Uses electrical impulses
  • Acts for a short time
  • Acts on a precise area
  • Endocrine System:
  • Slow acting
  • Uses chemicals
  • Acts for a long time
  • Can act in a general way