Trapezius is a large paired trapezoid-shaped surface muscle. Extends from occipital bone to lower thoracic vertebrae. Has three functional parts: upper, middle, and lower
Arm refers to the upper limb between shoulder and elbow joints. Distal part between elbow and wrist is forearm, beyond wrist is hand. Shoulder girdle and axilla are components of arm
Equine anatomy includes gross and microscopic features of horses and related animals. Horses have 205 bones divided into appendicular and axial systems. Hoof is a strong keratin-based structure for walking
Skeletal muscle enables movement and maintains posture, joining to bones via tendons. Smooth muscle is involuntary and found in digestive and urinary systems. Cardiac muscle is self-excitatory and found only in the heart
Muscular system consists of skeletal, smooth, and cardiac muscle. Adult male human body contains over 600 muscles. Each muscle contains thousands of muscle fibers with fibrils. Skeletal muscle is striated and organized into motor units
Upper limbs extend from scapulae to digits in upright vertebrates. Human upper limb divided into shoulder, arm, elbow, forearm, wrist and hand. Muscles classified by origin, topography, function or innervation