What do sarcomeres consist of?

Sarcomeres are the fundamental contractile units of striated muscle tissue, consisting of organized arrangements of myofilaments. They primarily contain thick filaments made of myosin and thin filaments composed of actin, along with regulatory proteins like troponin and tropomyosin. The arrangement of these filaments creates a repeating pattern that contributes to the muscle's striated appearance and its ability to contract. Sarcomeres are delineated by Z-discs, which anchor the thin filaments and define the boundaries of each sarcomere.