Which term refers to the cells that make up the structure of a muscle and run the length of the muscle?

The correct term for the cells that constitute the structure of a muscle and extend the length of the muscle is "muscle fibre." Muscle fibres are elongated cells that contain the necessary components for muscle contraction, including myofibrils, which are the contractile proteins within the fibres. These fibres play a crucial role in muscle function, as they are responsible for generating the force required for movement.

Muscle fibres are specialized cells that combine to form muscle tissue, and each fibre is surrounded by a plasma membrane known as the sarcolemma. The arrangement of muscle fibres allows for effective contraction and relaxation, which are fundamental to the movement of the body.

The term "myofibril" refers to the smaller, thread-like structures within each muscle fibre that contain the contractile proteins actin and myosin. While myofibrils are critical to the contraction process, they do not themselves make up the structure of the whole muscle.

"Connective tissue" is a type of tissue that supports, binds together, and protects other tissues and organs. While it plays a vital role in the overall structure of muscles (such as tendons and the fascia surrounding muscles), it does not refer to the muscle cells themselves.

"Muscle cell" is a