muscoli
Muscoli, the Italian word for muscles, are contractile tissues that enable movement, stabilize joints, and generate heat. In humans they are classified into three main types: skeletal muscles, smooth muscles, and cardiac muscle. Skeletal muscles attach to bones via tendons and produce voluntary movements; they are striated and organized into fibers bound into groups. Smooth muscles occur in the walls of hollow organs and blood vessels, driving involuntary motions such as peristalsis and vasoconstriction; they are non-striated. Cardiac muscle forms the heart walls and contracts rhythmically to pump blood; it shares properties with both skeletal and smooth muscle.
Muscle fibers consist of long cells containing myofibrils arranged in sarcomeres. Contraction is driven by the
Muscles adapt to use. Resistance training promotes hypertrophy and strength gains through neural and muscular changes;