Fig. 1. 1, The right auricle of the heart. 2, The left auricle. 3, The right ventricle of the heart. 4, The left ventricle. 5, The pulmonary artery. 6, The branch of the pulmonary artery to the left lung. 7, The branch of the pulmonary artery to the right lung. 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, Branches of the pulmonary artery in the right and left lung. 9, 9, 9, 9, 9, 9, Air-cells. 10, 10, 10, 10, 10, 10, 10, Small pulmonary veins in the right and left lung. 11, The left pulmonary vein. 12, 12, The right pulmonary vein.
Fig. 2. An ideal View of the Pulmonary Circulation. 1, 1, The right lung. 2, 2, The left lung. 3, The trachea. 4, 4, 4, 4, 4, The right bronchia. 5, 5, 5, 5, 5, The left bronchia. 6, 6, 6, 6, 6, 6, Air-cells, with arteries and veins passing around them. 7, The right auricle of the heart. 8, The right ventricle of the heart. 9, The tricuspid valves. 10, The pulmonary artery. 11, 11, 11, 11, The right pulmonary artery. 12, 12, 12, 12, 12, The left pulmonary artery. 13, 13, 13, 13, The right pulmonary vein. 14, 14, 14, 14, The left pulmonary vein. 15, The left auricle. 16, The left ventricle. 17, The mitral valves. 18, The septum between the right and left ventricles.
Fig. 3. An ideal View of the Capillaries. 1, 1, A branch of the pulmonary artery. 2, 2, A branch of the pulmonary vein. 3, 3, Capillary vessels between the artery and vein.
Fig. 4. An ideal View of the Relations of the Bronchia, Air-cells, Pulmonary Arteries, and Veins. 1, A bronchial tube. 2, 2, 2, Air-cells. 3, A branch of the pulmonary artery. 4, A branch of the pulmonary vein.
PLATE VIII.
THE CEREBRUM, CEREBELLUM, SPINAL CORD, AND NERVES.
1, The cerebrum. 2, The cerebellum. 3, 3, The spinal cord. 4, The brachial plexus of nerves. 5, The lumbar plexus of nerves. 6, The sacral plexus of nerves. 7, The facial nerve. 8, 17, The radial nerve. 9, 9, 16, The ulnar nerve. 10, The median nerve. G, The circumvex nerve of the shoulder.
11, 11, The great sciatic nerve. 12, The external popliteal, or peroneal 474 nerve. 13, 13, The posterior tibial nerve. 14, The external tibial nerve. 15, The muscular branch of the external peroneal nerve. 18, The muscular branch of the sciatic nerve. P, Q, The posterior tibial nerve.
The letters and other figures indicate minor nervous filaments distributed to the various muscles and the skin.
PLATE IX.
THE SKIN.
Fig. 1. A perspiratory Tube and Gland. 1, 1, The contorted portion of the tube that forms the gland. 2, 2, Two branches which unite to form the main duct of the gland. 3, 3, The perspiratory tube. 4, The cuticle. 5. Its colored portion. 6, The cutis vera, (true skin.) 7, 7, Fat vesicles, in which the gland is imbedded.