Every structure in the human body has a specific function. 200 bones, 650 muscles, 79 organs, and enough blood arteries to circle Earth twice. Anatomy regional Defines bodily parts Upper/lower limbs, trunk/back, thorax/abdomen/pelvis, head/neck, neuroanatomy Systemic anatomy consist of Integumentary, neurological, musculoskeletal, circulatory, respiratory, digestive, urinary, reproductive, lymphatic systems Shoulder, arm, forearm, and hand are upper-limb components. Hip, thigh, leg, and foot are lower limb parts. Lower extremities contain some of the body's strongest, compartmentalised muscles. The femoral artery and sciatic nerve supply this limb. The trunk, or torso, connects the upper and lower limbs. Thorax, abdomen, pelvis, and back make up the trunk. The spinal cord runs through the back's vertebral column. Trapezius, latissimus dorsi, and rhomboids are linked to the spinal column, as are deeper, smaller muscles. Back muscles help with posture, trunk bending, arm movement, should
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