Arm Muscle Anatomy Labeled Infographic of Human Arm Layers

Biological diagram infographic titled "Muscular System Layers of the Human Arm" centered on a clean labeled comparison diagram of two matching human upper-arm cross-sections and side cutaway views: left panel showing superficial layer anatomy, right panel showing deeper layer anatomy, editorial-grade anatomical cross-section for high school/general audience. Compose the page with a clear central comparison of the upper arm from shoulder to elbow, showing skin removed in one view and a cross-section through the mid-humerus in the other, so the layered organization of the muscular system is easy to compare. Add 9 labeled parts arranged evenly around the central diagram with thin leader lines; each label must include a short English heading and a one-line English function description. Use biologically accurate human anatomical naming and scientifically correct proportions. Required labels and exact on-image text: "Skin" — "Protective outer covering over the arm."; "Superficial fascia" — "Connective tissue layer that stores fat and supports vessels."; "Deep fascia" — "Fibrous sheath that surrounds and separates muscles."; "Biceps brachii" — "Flexes the elbow and helps rotate the forearm."; "Brachialis" — "Primary muscle that bends the elbow joint."; "Triceps brachii" — "Extends the elbow and straightens the forearm."; "Humerus" — "Upper arm bone that anchors muscles and supports movement."; "Neurovascular bundle" — "Arteries, veins, and nerves that supply the arm tissues."; "Tendon" — "Dense connective tissue that attaches muscle to bone." Emphasize comparison between outer muscular layer and deeper supporting layers, with subtle callouts noting superficial versus deep organization. Visual style: colorful kids-book combined with educational clinical diagram design; cool clinical blues palette with cyan, teal, slate blue, soft navy, and white accents; friendly, clean, approachable mood; crisp high-contrast typography; all text sharp and readable. Include a small legend for layer colors and subtle section headers such as superficial and deep if needed, in English. Use medical-textbook clarity, editorial scientific illustration, vector-clean lines, no photographic textures. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no graphic gore, no real patient photos, no watermarks No graphic medical gore, no real patient photographs, no surgical blood. For human anatomy, keep illustrations educationally tasteful. For animal anatomy, no cruelty imagery. Scientifically accurate labeling and proportions.