Which component of the muscular system is considered striated?

The correct choice highlights that both cardiac and skeletal muscle are considered striated muscle types. Striated muscle is characterized by its appearance under a microscope, specifically the presence of alternating light and dark bands, known as striations.

Skeletal muscle, which is responsible for voluntary movements and is attached to bones, has a distinct striated appearance. This striation is a result of the organized arrangement of myofilaments within the muscle fibers.

Similarly, cardiac muscle, found exclusively in the heart, also exhibits striations. These striated features are critical for the heart's ability to contract effectively and rhythmically, contributing to pulse generation and blood circulation.

Smooth muscle, on the other hand, lacks striations and appears uniform under a microscope. It is found in the walls of hollow organs such as the intestines and blood vessels, where involuntary contractions occur.

Thus, the designation of both cardiac and skeletal muscle as striated is substantiated by their shared histological features, which are integral to their respective functions in the body.