Muscle Location in the Human Body: Deep to Skin, Not Superficial

Muscles are not the outermost layer of the body. The skin (integumentary system) covers the exterior. Muscles lie deep to the skin and subcutaneous tissue, organized in layers:

• Superficial fascia (subcutaneous tissue): Loose connective tissue and fat.
• Deep fascia: Dense connective tissue enveloping muscles.
• Muscle bellies: Contractile tissue organized into compartments.
• Deep to muscles: Bones, joints, viscera.

This arrangement protects muscles while allowing skin mobility over underlying structures. Only tendons and aponeuroses approach the surface at specific sites (e.g., palmaris longus tendon at wrist).