Muscles are of three types. Which of the following is NOT one of them?

Sesamoids

The correct answer is Option (1) -Sesamoids

Among the three types of muscles, "Sesamoids" is not one of them. The three types of muscles are:

1. Skeletal muscles: These are attached to bones and are responsible for voluntary movements of the body, such as walking, running, and lifting weights.
2. Smooth muscles: These are found in the walls of internal organs, blood vessels, and other structures and are responsible for involuntary movements, such as the contractions of the digestive system and blood vessels.
3. Cardiac muscles: These are found in the heart and are responsible for pumping blood throughout the body. They are also involuntary muscles.

"Sesamoids," on the other hand, are small, round bones embedded within certain tendons, typically found in locations where a tendon passes over a joint, such as the kneecap (patella) or the base of the thumb. They serve to protect the tendon and improve its mechanical function but are not muscles themselves. Therefore, "Sesamoids" do not belong to the classification of muscle types.