| Hormone | Function | ||
| 1. | T3 | - | Promotes erythropoiesis |
| 2. | TCT | - | Regulates blood calcium level |
| 3. | PTH | - | Stimulates the process of bone resorption |
| 4. | Epinephrine | - | Decreases alertness and increase pupillary constriction |
| 1. | Thyroid gland and parathyroid gland |
| 2. | Pituitary gland and pineal gland |
| 3. | Adrenal gland and thymus |
| 4. | Pineal gland and thyroid gland |