Which of the following are NOT one of the three types of muscles?

Elastic is not recognized as one of the three primary types of muscle tissue in the human body. The three main types of muscles are smooth, cardiac, and skeletal.

Smooth muscle is involuntary and found in the walls of internal organs, such as the intestines and blood vessels. It plays a crucial role in various automatic bodily functions, like digestion and regulating blood flow.

Cardiac muscle is a specialized type of striated muscle that makes up the heart. It is also involuntary, meaning that its contractions are not consciously controlled, and its rhythmic activity is essential for pumping blood throughout the body.

Skeletal muscle, on the other hand, is voluntary and is primarily responsible for movement. It is attached to bones and allows for locomotion and various physical activities.

Elastic does pertain to the properties of muscle tissue, such as its ability to stretch and return to its original shape, but it is not classified as a distinct type of muscle tissue like the other three. Understanding the functionalities and locations of the recognized muscle types helps to clarify why elastic does not belong in that classification.