ANATOMY

Detailed explanation-1: -For example, the deltoid is a large, triangular-shaped muscle that covers the shoulder. It is so-named because the Greek letter delta is a triangle.

Detailed explanation-2: -The skeletal muscle’s anatomical location or its relationship to a particular bone often determines its name. For example, the frontalis muscle is located on top of the frontal bone of the skull.

Detailed explanation-3: -Shape: The deltoid (triangular), trapezius (trapezoid), serratus (saw‐toothed), and rhomboideus major (rhomboid) muscles have names that describe their shapes.

Detailed explanation-4: -These include naming the muscle after its shape, its size compared to other muscles in the area, its location in the body or the location of its attachments to the skeleton, how many origins it has, or its action.

Detailed explanation-5: -the collagen content of the muscle. Which muscle is named for either shape or size? orbicularis oris.