Final answer:
Endomysium is a type of connective tissue that covers each muscle fiber in a skeletal muscle, supporting the fibers and containing necessary nutrients supplied by the blood.
Step-by-step explanation:
The term endomysium refers to the loose, well-hydrated connective tissue that covers each muscle fiber in a skeletal muscle. It is one of the three connective tissues commonly known as the mysia, which also include the perimysium and epimysium. The endomysium contains collagen and reticular fibers, enveloping each individual muscle fiber and creating a supportive environment that contains the extracellular fluid and nutrients necessary for the muscle fiber's function. These nutrients are delivered through the blood supply to the muscle tissue.
In terms of organization within the muscle, muscle fibers are bundled into units called fascicles by the perimysium, and the whole muscle is covered by the epimysium. These connective tissue layers not only support and protect the muscle fibers but also help in transferring the force generated by muscle contractions to the tendons, and then to bones, aiding in the movement of the skeleton.