Medically reviewed by Nicholas R. Metrus, MD Key Takeaways Neurons are cells that transmit electrical signals through the ...

Glial cells are an integral part of the human nervous system. They help support and nourish nerve cells, or neurons. Several types of glial cells exist. Glial cells are the “glue” of the nervous ...

Hormones are the body’s chemical messengers. They act on various tissues and organs in the body to change their behavior. For example, the hormone prolactin stimulates the production of breastmilk.

Your body functions using chemical messages that are directed throughout your system with specific targets. These chemical messages are carried by neurotransmitters, which act as a messenger directing ...

Body functionality refers to everything that the body can do. Body functions broadly fall into six domains, including (1) physical capacities (e.g., stretching), (2) internal processes (e.g., ...