Kevin Young

anatomy system muscles skeletal education human digestive articulations appendicular appendicular skeleton terminology bones distance liver intestines stomach digestion creativity tina_seelig stanford respiratory joints introduction body regions heart veins arteries autonomic nervous system anatomy nervous system autonomic ans anatomy nervous system pns anatomy nervous system cns axial skeleton ribs vertebrae arm shoulder humerus ulna radius tibia femur fibula pelvis cartilage development integumentary skin histology embryology anatomical body regions cells organelles human evolution science history skull skeleton evolution