| A | B |
| adenohypophysis | anterior pituitary gland |
| adrenal gland | glands that rest on top of the kidneys |
| endocrine | secreting into the blood or tissue rather than a duct |
| gonads | primary sex organs |
| hormone | regulatory substance secreted by endocrine system |
| target cell | any cell with one or more receptors for a particular hormone |
| thymus | endocrine gland located in the mediastinum; vital part of the body's immune system |
| thyroid | endocrine gland located in the neck whose hormones regulate cellular metabolism |
| tropic hormone | hormone that stimulates another endocrine gland to grow and secrete its hormones |
| parathyroid | endocrine glands embedded in the posterior aspect of the thyroid gland |