1. Growth and Development
The Endocrine System

2. Endocrine System
The endocrine system is a system of glands that secrete chemical hormones that help control body functioning.

3. Endocrine Glands
A tissue or group of tissues that makes and releases chemicals is called a gland. The chemical product of an endocrine glands is called a hormone. Endocrine glands produce and release hormones directly into the bloodstream.

4. Hormones
Hormones are the chemical product of endocrine glands.
Hormones turn on, turn off, speed up, or slow down the activities of different organs and tissues.

5. Target Cells
Target cells are cells that recognize the hormone’s chemical structure. A hormone interacts only with specific target cells the way a key fits into a lock. Hormones travel through the bloodstream until they find their “lock” or particular cell type.

6. Negative-Feedback Mechanism
Endocrines systems method of regulating the level of hormones in the blood.

7. Hypothalamus
A part of the brain that regulates the activities of the pituitary gland.
Located in the lower central part of the brain.
Links the nervous system and endocrine systems and controls the pituitary gland

8. Pituitary Gland
Stimulates skeletal growth
Stimulates development of male and female sex organs.

9. Thyroid Gland
Produces Thyroxine to increase the body’s metabolism.
Maintains the level of calcium and phosphorus in the blood.

10. Parathyroids
Regulates the level of calcium and phosphorus in the blood
Located on the back of the thyroid

11. Thymus
Development of the immune system
Located below the thyroid and behind breast bone
Large in children but shrinks to the size of a thumb in adults

12. Adrenal Glands
Increases heart and breathing rate, raises blood pressure
Produce Epinephrine and norepinephrine
Located on the top of each kidney

13. Regulates the amount of sugar in the blood.
Pancreas
Produces insulin
Regulates the amount of sugar in the blood.

14. Ovaries Produces female sex characteristics
Located on both sides of the uterus below the opening of the fallopian tube.
Contain the egg cells necessary for reproduction.
Produce estrogen and progesterone

15. Testes
Produces male sex characteristics
Located in the scrotum
Produce testosterone and sperm