glands. ( Male on the left, female on the right.) 1. Pineal gland 2. Pituitary gland 3. Thyroid gland 5. Adrenal gland 6. Pancreas 7. Ovary 8. Testis . Note: the Thymus (labelled 4.) is not an endocrine gland. In physiology, the endocrine system is a system of glands, each of