The document provides an overview of the endocrine system and reproductive hormones. It describes how endocrine glands release hormones directly into the bloodstream without ducts. Hormones are released through nervous stimulation or in response to compounds in the blood like metabolites or other pituitary hormones. Negative feedback loops characterize this latter method of hormonal control. Reproductive hormones in females include follicle stimulating hormone, estrogen, and luteinizing hormone, while in males they include luteinizing hormone and testosterone.

1. The Endocrine System An overview of hormonal control and revision of reproductive hormones

3. endocrine cell

4. endocrine cell

5. endocrine cell bloodstream

6. endocrine cell bloodstream target cell

7. endocrine cell bloodstream target cell

8. endocrine cell bloodstream target cell

9. endocrine cell bloodstream target cell

10. endocrine cell bloodstream target cell pathway of chemical coordinator in endocrine system

13. presence of metabolite or pituitary hormone in blood

14. presence of metabolite or pituitary hormone in blood endocrine gland stimulation

15. presence of metabolite or pituitary hormone in blood endocrine gland stimulation hormone release

16. presence of metabolite or pituitary hormone in blood endocrine gland stimulation hormone release hormone release

17. presence of metabolite or pituitary hormone in blood endocrine gland stimulation hormone release hormone release removal of metabolite or inhibition of pituitary hormone release leads to

18. presence of metabolite or pituitary hormone in blood endocrine gland stimulation hormone release hormone release removal of metabolite or inhibition of pituitary hormone release leads to endocrine gland inhibition

19. presence of metabolite or pituitary hormone in blood endocrine gland stimulation hormone release hormone release removal of metabolite or inhibition of pituitary hormone release leads to endocrine gland inhibition no hormone released leads to

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