Skeletal muscles occur in antagonistic pairs, held together by connective tissue with a tendon at each end attached to the bones

Collagen is a fibrous protein in tendons and bones that prevent them from breaking or stretchy

Arthropods have exoskeletons as their cuticle. This must be shed to grow

Skeletal muscle consists of muscle fibres, each containing many myofibrils

Sliding filament hypothesis of muscle contraction is like a ratchet mechanism