Endocrine system

3. The "master switchboard" located at the base of the brain that links the nervous and endocrine systems.
7. General term for reproductive organs; Ovaries in females and Testes in males.
10. Primary hormone responsible for female puberty.
11. Hormone that elevates blood glucose levels.
13. A small, cone-shaped gland in the brain that secretes melatonin to regulate sleep.
16. The primary hormone produced by the thyroid (often abbreviated as T4).
17. Glands located on top of the kidneys that produce adrenaline (epinephrine) and cortisol.
18. General term for a chemical messenger released into the bloodstream.
19. A butterfly-shaped gland in the neck that controls metabolism.
20. The specific cell or organ that a hormone is intended to affect.
23. Four tiny glands on the back of the thyroid that regulate calcium levels.
24. A characteristic of endocrine glands; they release substances directly into the blood

1. The predominant male gonadal hormone.
2. Stimulates uterine contractions and lactation.
4. Hormone responsible for the sleep/wake cycle.
5. Medical Terminology
6. Hormone that reduces blood glucose levels.
8. Often called the "master gland" because it regulates many other endocrine glands.
9. An organ behind the stomach that regulates blood sugar using insulin and glucagon.
12. Abnormal enlargement of the thyroid gland.
14. Also known as epinephrine, it triggers the "fight-or-flight" response.
15. The constant adjustment of hormone levels to maintain balance.
21. Located in the upper chest, it helps develop the immune system early in life and is sometimes called the "disappearing gland".
22. Hormones (Chemical Messengers)