What type of muscle tissue is found within the walls of blood vessels?

Smooth muscle tissue is the correct answer because it is specifically designed for involuntary movements and is found in the walls of hollow organs, including blood vessels. This type of muscle is non-striated, which distinguishes it from skeletal and cardiac muscle tissues. Smooth muscle cells are responsible for regulating the diameter of blood vessels, facilitating processes such as vasoconstriction and vasodilation, which are critical for maintaining blood flow and pressure.

Skeletal muscle tissue is involved in voluntary movements and is attached to bones, allowing for movement of the skeletal system. Cardiac muscle tissue is unique to the heart, allowing it to contract rhythmically and pump blood. Striated muscle tissue refers to both skeletal and cardiac muscle due to the presence of striations or stripes, which are not characteristics of smooth muscle. Thus, smooth muscle is specifically the type found in the walls of blood vessels, working unconsciously to support various bodily functions.