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A muscle is composed of many muscle fibres. The diagram shows a muscle attach… | Basic anatomy and physiology, Human anatomy and physiology, Muscular system anatomy
A muscle is composed of many muscle fibres. The diagram shows a muscle attached to the bone by a tendon, which surrounds the muscle. A muscle is composed of muscle fibre bundles. Nerves and blood vessels run alongside the length of a bundle. Within each bundle are individual muscle fibres which contain nuclei and reticulum. Within each muscle fibre there are myofibrils. Each myofibril contains myofilaments of the contractile proteins actin and myosin.
