musculáris

Muscular is a term of Latin origin, derived from the word "musculus," meaning "little mouse." It is used in biology and medicine to describe anything related to muscles. Muscles are soft tissues found in most animals. They are composed of protein filaments, actin and myosin, that slide past one another, producing a contraction that changes both the length and the shape of the cells. Muscles function to produce force and motion. They are responsible for locomotion, including all movement of the body, as well as internal functions like pumping blood and moving food through the digestive system.

There are three main types of muscles in the human body: skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscles are voluntary muscles, meaning they are under conscious control and are attached to bones, enabling movement. Smooth muscles are involuntary and are found in the walls of internal organs such as the stomach, intestines, and blood vessels. Cardiac muscle is also involuntary and forms the wall of the heart, responsible for pumping blood. The study of muscles is called myology. Muscular diseases can affect a person's ability to move and perform daily activities. These conditions can range from mild strains to severe degenerative disorders.