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
Hand is a prehensile appendage at end of forearm in primates. Human hand has five digits: four fingers plus one thumb. Contains 27 bones, including 14 phalanges and 5 metacarpals. Adult male hand weighs about a pound
Digestive system consists of gastrointestinal tract and accessory organs. Gastrointestinal tract extends from mouth to anus, about 9 meters long. Accessory organs include liver, gallbladder, pancreas, tongue, and teeth
Respiratory system enables gas exchange in animals and plants. Land animals have internalized lungs with millions of alveoli. Fish have external gills for gas exchange in water. Plants have stomata for gas exchange
Leg includes thigh, calf, and shank regions between knee and ankle. Each leg contains 60 bones, with femur, tibia, and fibula as major components. Legs are adapted for efficient bipedal gait, unlike other primates. Female legs have greater hip anteversion and tibiofemoral angles
Study human anatomy before starting. Read about art to improve drawing skills. Practice sketching regularly. Find an artist to observe and teach