What are the three types of muscle?

The three types of muscle in the human body are cardiac, skeletal, and smooth. Cardiac muscle is found exclusively in the heart and is responsible for pumping blood throughout the body. Skeletal muscle, which is attached to bones, enables voluntary movement and is under conscious control. Smooth muscle, on the other hand, is found in various internal organs and is responsible for involuntary movements such as the movement of food through the digestive tract.

Option B refers to voluntary and involuntary muscle, which does introduce the concept of how muscles are classified based on control; however, it does not accurately identify the specific types of muscles. Voluntary muscles refer to skeletal muscles that you can control consciously, while involuntary muscles include both cardiac and smooth muscles, which operate without conscious control.

Recognizing the correct classification helps in understanding how different muscles function within the human body, which is essential knowledge for someone pursuing EMD certification. Correct knowledge of these muscle types is vital for understanding the physiological responses in emergency situations, particularly when assessing patients based on their muscular system and conditions that arise from muscle-related issues.