Endocrine Figure 11.1.(a)The anatomy of some of the endocrine glands. (b)An islet of Langerhans within the pancreas. endocrine system: endocrine glands Pituitary. Pineal body Hypothalamus Thyroid gland endocrine cells Parethyroid glands (behind thyroid gland) Adrenal. Pancreas. Ovary. Testis (aendocrine system: Endocrine endocrine glands endocrine cells