| X | Y | Z | |
| 1. | Thymus | Heart | ANF |
| 2. | Parathyroid | Thyroid | TCT |
| 3. | Adrenal | Kidney | Erythropoietin |
| 4. | Neurohypophysis | Adenohypophysis | TSH |
| Endocrine gland | Hormone | Functions | |
| 1. | Placenta | estrogen | initiates secretion of milk |
| 2. | Corpus luteum | estrogen | essential for the maintenance of endometrium |
| 3. | Leydig cells | androgen | initiates the production of sperm |
| 4. | Ovary | FSH | stimulates follicular development and the secretion of estrogens |
| 1. | a and c | 2. | b and c |
| 3. | b and d | 4. | a and d |