Final answer:
Skeletal muscles are the type of muscles that can be voluntarily controlled, in contrast to cardiac and smooth muscles which are involuntary.
Step-by-step explanation:
The muscle type that can be voluntarily controlled is skeletal muscle. Voluntary muscles are those that can be controlled by an individual's will, and the skeletal muscles fall into this category. On the other hand, involuntary muscles, such as cardiac muscles and smooth muscles, cannot be consciously controlled. This distinction is important for understanding how different parts of our body function without the need for conscious effort versus those that we can move at will, like our arms and legs.