| A | B |
|---|
| endocrine system | uses chemicals to control the systems of the body |
| hormones | chemicals made in the glands throughout the body that affect target tissues |
| pineal gland | produces melatonin to regulate wake/sleep patterns |
| pituitary gland | attached to the hypothalamus and helps control growth and reproduction |
| thymus | located in upper chest and stimulates the production of infection-fighting cells |
| thyroid gland | located below the larynx and regulates metabolic rates, calcium uptake by bones, and nervous system development |
| parathyroid gland | located on the back of the thyroid and regulates calcium levels in the body |
| adrenal gland | located on the kidneys and helps adapt to physical and emotional stress and stabalizes blood sugar |
| pancreas | contains islets of Langerhans and controls sugar levels in the bloodstream |
| testes | produce testosterone and controld the development and maintenance of male sexual traits |
| ovaries | produces estrogen and progesterone to regulate the reproductive cycle and produce and maintain female sex characteristics |
| negative-feedback system | sends chemical messages back and forth to increase and decrease hormone levels |
