Muscles

Muscles are organs made up of specialised cells that allow the body to move and generate force. They are an essential element of the human body, and have a range of vital functions, such as allowing the body to move, speaking, breathing, pumping blood around the body and even digesting food. They are also responsible for generating heat and maintaining posture. To achieve this, muscles are composed of filaments of protein called actin and myosin that slide past one another, generating tension and allowing for movement. Different muscles are used for specific tasks, and can be trained to become stronger and more efficient.