Body type, or somatotype, describes a person's general body composition, proportion, and structure. The system classifies three types of body shapes: ectomorph, mesomorph, and endomorph. Jump to Key ...

Nociceptors—commonly known as pain receptors—found throughout the body in bones, blood vessels, muscles, and skin, alert the body to damage and the risk of injury. Nociceptors are essentially nerve ...

The concept of somatotypes is based on the understanding that everyone is born with a body type. Body type, or somatotype, is inherited and expresses itself as skeletal structure and body composition.