The Endocrine System

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Transcript of The Endocrine System

  • 1. The Endocrine System Glands, Hormones and Whatnot

2. Glands of the Endocrine System 3. Endocrine System

  • Made up of glands that secrete hormones.
  • These glands affect organs, muscles and other glands in the body.

4. Pineal Gland 5. Pineal Gland

  • Regulates the bodies daily cycles (circadian rhythms) of sleep/waking.
  • Produces the hormonemelatonin -released in the dark during sleep .
  • Pineal gland secretes it when our eyes register the fall of darkness .

6. Hypothalamus 7. Hypothalamus

  • Secretes hormones that make other endocrine glands secrete their hormones.
  • Considered the control center of the endocrine system.
  • Produces two types of hormones:
  • 1)Releasing hormones- switch on hormone production.
  • 2)Inhibiting hormones- switch off hormone production.

8. Pituitary Gland 9. Pituitary Gland

  • 2 sections-anterior (front)-posterior (back).
  • Considered the master gland of the endocrine system.

10. Hormones of the Pituitary Gland

  • (FSH) Follicle Stimulating Hormone-stimulates the follicle of the ovaries to release estrogen.
  • In males, it helps in the production of sperm.

11. Prolactin

  • During pregnancy, prepares the breasts for milk production.

12. Human Growth Hormone (HGH)

  • Promotes body growth (muscles, bones, ligaments, etc.)
  • Hyposecretion=dwarfism
  • Hypersecretion=gigantism

13. 14. Luteinizing Hormone (LH)

  • In females-stimulates the production of estrogen at inception of menstruation.
  • Triggers ovulation (release of the ovum).
  • In males-produces testosterone.

15. Antidiuretic Hormone (ADH)

  • Acts on the collection ducts of the kidneys to facilitate the reabsorption of water into the blood-reducing the volume of urine formed in the kidneys.

16. Oxytocin

  • Stimulates contraction of the uterus during childbirth.
  • Stimulates releasing of milk when babies begin to suckle.
  • Acts on the amygdala to enhance bonding between males and females after they mate.

17. Vasopressin

  • Released by the Posterior pituitary.
  • Constricts blood vessels and raises blood pressure

18. Thyroid 19. Thyroid

  • Regulates the bodys growth and metabolism.
  • ProducesThyroxine- increases rate of metabolism and increases rate and strength of heartbeat .

20. Adrenal Glands 21. Adrenal Glands

  • - Located on the kidneys.
  • Produce adrenaline and noradrenaline.
  • Prepare the body to respond to stress.
  • Regulate blood sugar and salt balances, growth of secondary sex characteristics.

22. Pancreas 23. Pancreas

  • Secretes two hormones that go directly into the bloodstream:
  • Insulin -lowers blood-sugar levels and increases the amount of glycogen (stored carbs) in the liver.
  • Glucagon- increases blood-sugar level if it becomes too low.

24. Pancreas

  • Too little insulin= diabetes
  • Too much insulin- hypoglycemia

25. Gonads 26. Gonads 27. Ovaries

  • Produce estrogen.
  • Development of breasts.
  • Widening of the pelvis.
  • Further development of vagina and uterus.
  • Growth of pubic hair.
  • Increase in fat tissue.

28. Testes

  • Produce testosterone which aids in sperm production and the development of secondary sex characteristics (facial hair, deepening of the voice) in males.