Endocrine System

• Works alongside the nervous system

  Acts slower than the nervous system but has more widespread and powerful effects in the body
• Glands in the body produce hormones, which travel in the bloodstream and effect any cell in the body which has a receptor for that specific hormone
• Thyroxine


  Produced in the thyroid gland

  Affects cells in the heart by increasing heart rate

  Affects cells throughout the body by increasing metabolic rates thus effecting growth rates
• Gland


  An organ in the body which synthesises substances such as hormones
• Hormone 


  Chemicals that circulate in the bloodstream and only effect target organs
• Adrenaline


  Hormone and neurotransmitter

  Produced in adrenal glands which is part of our immediate stress response

  Stimulates heart rate , contracts blood vessels and dilates air passages
• Endocrine System


  One of the major systems in the body

  Instructs glands to release hormones into the bloodstream