Endocrine System

1
Endocrine System
2
Endocrine System

• What is the purpose?
• to regulate body activities through the use of
  chemicals known as hormones
• a hormone is a chemical produced by a gland that
  affects the activities of other organs or tissues

3
Endocrine System
4
Endocrine System

• hormones work through a lock-n-key system

5
Glands and Hormones
Gland Hormone Affect on the Body
Hypothalamus Regulatory chemicals Regulates the activities of other endocrine glands
Pituitary HGH human growth hormone Gonad hormone Stimulates bone growth Stimulates development of sex organs
Adrenals Adrenaline Increases heart rate, blood pressure and breathing rate
Thyroid Thyroxine Increases rate of metabolism
Pancreas Insulin Glucagon Decreases blood sugar level Increases blood sugar level
Ovaries Estrogen Progesterone Produces female secondary sex characteristics Promotes growth of uterine wall
Testis Testosterone Produces male secondary sex characteristics
6
Endocrine System

• Negative Feedback System hormones work together
  in opposition as one increases the other
  decreases to create a balance

• Example In the diagram ACTH and Glucocorticoids
  are working in opposition to control the adrenal
  response when the body is stressed more
  adrenaline is needed