Which of the following is NOT one of the three muscle types?

The correct answer is based on the inclusion of muscle types in human anatomy. Skeletal, visceral, and cardiac muscle are the three primary types of muscles found in the human body. Skeletal muscles are under voluntary control and are responsible for movement of the skeleton. Cardiac muscle is involuntary and is found only in the heart, enabling it to pump blood. Visceral muscle, also known as smooth muscle, is also involuntary and is found in the walls of hollow organs, such as the intestines and blood vessels.

Liquid tissue, however, does not classify as a muscle type. Instead, it refers to tissues such as blood that transport nutrients and waste throughout the body but do not serve any muscular function. Thus, the identification of liquid tissue as not being one of the three muscle types is accurate, as it does not function as a muscle or possess muscle characteristics.