Adipose Tissue Adrenal Cortex Adrenal Gland Adrenal Medulla Bone Gastrointestinal Tract Heart Hypothalamus Kidney Liver Ovary Pancreas Pancreatic Islet Parathyroid Gland Pineal Gland Pituitary Gland Pituitary Gland Anterior Pituitary Gland Posterior Placenta Skin Testis Thymus Thyroid Gland