Here's a breakdown:
* Hormones: Chemical messengers that travel through the bloodstream to target cells and organs, regulating various bodily functions.
* Endocrine glands: Specialized organs or tissues that produce and secrete hormones directly into the bloodstream.
Examples of endocrine glands include:
* Pituitary gland: Controls growth, metabolism, and reproduction.
* Thyroid gland: Regulates metabolism and energy production.
* Parathyroid glands: Control calcium levels in the blood.
* Adrenal glands: Produce hormones like cortisol and adrenaline, involved in stress response.
* Pancreas: Secretes insulin and glucagon, regulating blood sugar levels.
* Ovaries (in females) and Testes (in males): Produce sex hormones.
It's important to note that some organs like the heart, kidneys, and digestive system also have cells that produce hormones, but their primary function isn't hormone production.