1. Endocrine System Major Organs

2. Pituitary Gland Size of a grape Hangs by a stalk from the inferior surface of the hypothalamus. Two lobes Anterior lobe Posterior lobe

4. Hormones of Pituitary Anterior Lobe - GH, prolactin, FSH, LH, TSH Posterior Lobe – oxytocin and ADH

5. Hypothalamus Floor of the diencephalon of the brain.

7. Hormones of Hypothalamus Releasing and inhibiting hormones that regulate the pituitary gland.

8. Thyroid Gland Located at the base of the throat inferior to the Adam’s apple. Consists of two lobes joined by the isthmus.

10. Hormones of Thyroid Gland Thyroxine (T 4 ) Triiodothyronine (T 3 ) Calcitonin

11. Parathyroid Glands Tiny masses of glandular tissue. Found on the posterior surface of the thyroid gland. Two glands on each thyroid gland.

13. Hormones of Parathyroid Glands Parathyroid hormones

14. Adrenal Glands Two bean-shaped glands. Found on top of the kidneys. Adrenal cortex – outer region Adrenal medulla – inner region

16. Hormones - Adrenal Glands Adrenal medulla Epinephrine Norepinephrine Adrenal cortex Glucocorticoids Mineralocorticoids

17. Pancreatic Islets Little masses of tissue scattered in the pancreas.

18. Pancreatic Islets

19. Hormones - Pancreatic Islets Insulin Glucagon

20. Pineal Gland Small, cone-shaped gland. Found in the roof of the 3 rd ventricle of the brain.

22. Hormones - Pineal Gland melatonin

23. Thymus Located at the upper thorax, posterior to the sternum.

24. Thymus

25. Hormones - Thymus Thymosine

26. Gonads Female Gonads Ovaries – paired almond-sized organs Located in the pelvic cavity. Male Gonads Testes – paired oval organs Located in sacs (scrotum) outside the pelvic cavity.

29. Hormones - Gonads Female Gonads Estrogen Progesterone Male Gonads Androgens (such as testosterone)