Rectus capitis ventralis muscle, 82 dorsalis muscle, 127 externus muscle, 127 inferior muscle, 127 internus muscle, 128 lateralis muscle, 127 medialis muscle, 128 superior muscle, 127 ventralis muscle, 127 Recurrent cardiacus nerve, 274 hepatici nerve, 274 infraorbital nerve, 269 intestinalis nerve, 227 laryngeus nerve, 273 lingualis nerve, 273 pharyngeus nerve, 272 pulmonale nerve, 274 renal artery, 223 renales nerves, 229 sinister artery, 227 subcutaneous nerve, 270 Red blood cells, 258 shape, 258 size, 259 structure, 259 Reflex action, 301 Renal artery, 226 corpuscle, 171 Respiratory apparatus, 193 Rete malpighii, 313 Retina, 303, 304, 323 Rhomboideus muscle, 97 profundus nerve, 282 superficialis nerve, 282 Ribs, 41 false, 41 true, 41 Ridge, ectonemial, 52 fibrillar, 52 post-acetabular, 48 procnemial, 52 trochanteric, 50 Rotation, 57 Round ligament, 65 Rudder feathers, 41 Sacralis media artery, 229, 232 Sacro-lumbalis muscle, 92 Sacs, air, 199 Sarcolemma, 70 Sartorius muscle, 111 Scala tympani, 306 vestibuli, 306 Scalenus medius muscle, 86 muscle, 86 Scapho-lunar bone, 47 Scapula, 43 Scapulo-humeralis muscle, 101 nerve plexus, 282 Sclerotic coat, 303, 304 Secondaries, 311 Secretion, internal, 190 Semilunar cartilage, 67 Semimembranosus muscle, 114 Seminiferous tubules, 318 Semitendinosus muscle, 114 accessorius muscle, 114 Sense of hearing, 305 of sight, 303 of smell, 307 of taste, 307 of touch, 307 organ, 303 Sensory nerves, 300 Septum nasi, 33 Serous cavity, 156 membrane, 156 sac, 156 Serratus magnus anticus muscle, 97 nerve plexus, 282 parvus anticus muscle, 97 Serum, 261 albumin, 261 globulin, 261 Sesamoid bone, 54 Sharpey’s fibers, 20 Sheath of Schwann, 277 Shell bloom, 188 gland, 187 membrane, 181 structure, 181 tint, 181 Shoulder girdle, 43 Sinus foraminis occipitales, 240 foveæ hemispherii cerebelli, 241 infraorbitalis, 32 Sinus longitudinalis, 239 occipitalis, 240 externus, 240 petrosus sphenoideus, 240 rhomboideus, 276 semicircularis, 240 temporales, 332 temporo-sphenoideus, 240 transversus, 240 venosus annularis basilaris, 240 Skeleton, 21, 24 appendicular, 43 axial, 22 division, 22 Skin, 309, 323 Small intestine, 147 Smooth muscle, 70 Soleus muscle, 118 Somatic cell, 318 Spermatic artery, 226 Spermatids, 318 Spermatocyte, 318 Spermatogenesis, 318 Spermatogonia, 318 Spermatozoa, 176, 318 Sphenoid artery, 217 bone, 28 rostrum, 29 Spheno-maxillary artery, 217 Spheno-palatine nerve ganglion, 270 Spinal cord, 38 nerves, 281 nervous system, 264 Splanchnology, 135 Splanchnopleure, 327 Spleen, 152, 155 Splenic artery, 227 capsule, 155 pulp, 155 Spur, 54, 317 Squamous epithelium, 137