Anatomy and Physiology – Muscular System Practice Test 2026 - Free Muscular System Practice Questions and Study Guide

A skeletal muscle is an organ because it’s a structure made of multiple tissue types that work together to perform a function. It contains skeletal muscle tissue (the contractile fibers) plus connective tissue wrappers (epimysium, perimysium, and endomysium) and a network of blood vessels and nerves. This combination lets the muscle contract, receive neural signals, and receive the energy and oxygen it needs to function, all within one discrete body part. It isn’t just nervous tissue, a single tissue type, or a single cell, but a coordinated organ built from several tissues.