| A | B |
| Hypothalamus | control center of brain |
| Pituitary gland | regulatory functions of brain |
| Pineal gland | produces melatonin |
| Thyroid gland | stores hormones |
| Parathyoid gland | secreates parathyroid hormone |
| Thymus | part of body's immune system |
| Adrenal glands | rests on top of kidneys |
| Pancreatic islets | source of insulin and glucagon |
| Ovaries | produces female sex hormones |
| Testes | produces male sex hormones |
| Plancenta | provides waste products for a mother and developing baby |