Neurons—the nerve cells responsible for transmitting electrical and chemical signals throughout the body—are organized in tissue, tending to cluster together in groups according to how they function.

Notable for their absence of structural heart diseases, they include a diverse group of diseases such as long QT syndrome, short QT syndrome, Brugada syndrome, early repolarization syndrome, ...

The skeletal system comprises 206 bones and has two main parts: the axial skeleton and the appendicular skeleton. The skeletal system includes your bones, ligaments that attach bone to bone, and ...