| A | B |
| Endocrine System | Secretes hormones |
| Hypothalamus | Bridge between endocrine and nervous system |
| Anterior Pituitary | Releases GH, LH, ACTH, FSH |
| Posterior Pituitary | Stores and releases hormones from the hypothalamus |
| Thyroid Gland | Releases thyroxin and calcitonin |
| Parathyroid Gland | Releases parathormone |
| Oxytocin | Stimulates contraction of uterus and mammary glands during labor |
| Antidiuretic hormone(ADH) | Stimulates the collecting tubule in nephron of the kidney |
| Thyroxin | Controls rate of metabolism |
| Calcitonin | Lowers blood calcium levels |
| Parathormone | Raises blood calcium levels |
| Adrenal cortex | Releases corticosteroids, raises blood sugar levels, responds to stress |
| Adrenal medulla | Releases epinephrine, raises blood sugar levels |
| Pancreas | Releases insulin and glucagon |
| Thymus gland | Essential to the development of a normal immune system, stimulates t-lymphocytes |
| Pineal gland | Secretes melatonin |
| Ovaries | Releases estrogen and progesterone |
| Testes | Releases testosterone |
| Positive feedback | Amplifies an already existing response and brings a process to an end |
| Negative feedback | Maintains homeostasis |