Some muscles are parts of an organ.

True

False

True

Explanation:

A whole skeletal muscle is considered an organ of the muscular system. Each organ or muscle consists of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. Skeletal muscles vary considerably in size, shape, and arrangement of fibers.

True

Explanation:

the skeletal muscle is considered an organ of the muscular system because each muscle or organ consists of nerve tissue, skeletal muscle tissue, blood/vascular tissue, and connective tissue. The skeletal muscle considerably varies in fiber arrangement, size, and shape.