Medically reviewed by Michael Menna, DO Key Takeaways The circulatory system carries oxygen and nutrients throughout the body and removes waste.The lymphatic system helps fight disease by creating and ...

Reviewed by Felix Gussone, MD. Key Takeaways: Hormones control essential processes like growth, metabolism, mood, and ...

The endocrine system is a network of glands that produces all the hormones used by the body. In addition to well-known sex hormones like testosterone and estrogen, it also secretes important hormones ...