| A | B |
|---|
| Hormone | organic substance secreted by a cell that has an effect onthe functions of another cell |
| Prostaglandins | lipids, synthesized from a fatty acid found in the cell membranes |
| Pituitary gland | located at the base of the brain, |
| Growth hormone | stimulates the body cells to increase in size and undergo rapid cell division |
| Prolactin | promotes milk production, stimulates and sustains the mother's milk production following the birth of an infant |
| Oxytocin | causes contractions of smooth muscles in the uterine wall and plays a role in the later stages of childbirth by stimulating uterine contractions |
| thyroid gland | very vascular structure that consists of two large lobes connected by a broad isthmus |
| Calcitonin | produced by the extrafollicular cells of the gland |
| Parathyroid glands | located on the posterior surface fo the thyroid gland |
| Adrenal medulla | consists of irregularly shaped cells that are arranged in groups around blood vessels |
