Skeletal muscles are

Skeletal muscles are

• A. Attached to frame of skeleton and involuntary
• B. Attached to frame of skeleton and voluntary
• C. Found in walls of internal organs
• D. Contributes to respiratory system

Answer: (B)

Skeletal muscles are the muscles that move the bones of the skeleton; they attach to bones (often via tendons) and are under voluntary control, meaning you consciously decide when to contract them. This combination—attached to the frame of the skeleton and controlled voluntarily—distinguishes them from smooth muscles found in the walls of internal organs (which are involuntary) and from other tissue types involved in respiration. Some skeletal muscles do assist breathing (like the diaphragm and intercostals), but the defining feature is their attachment to the skeleton and their voluntary control.

Skeletal muscles are the muscles that move the bones of the skeleton; they attach to bones (often via tendons) and are under voluntary control, meaning you consciously decide when to contract them. This combination—attached to the frame of the skeleton and controlled voluntarily—distinguishes them from smooth muscles found in the walls of internal organs (which are involuntary) and from other tissue types involved in respiration. Some skeletal muscles do assist breathing (like the diaphragm and intercostals), but the defining feature is their attachment to the skeleton and their voluntary control.