Related by context. Frequent words. (Click for all words.) 73 forelimb 73 hind limbs 72 forelimbs 63 theropod 61 caudal 61 tetrapod 61 bipedalism 61 morphologically 61 placental mammals 60 sexual dimorphism 59 morphogenesis 59 locomotor 59 tetrapods 58 vertebrate 58 oviduct 58 flagella 58 fossa 58 maxillary 58 pectoral fins 58 crocodilians 57 upright posture 57 mandibular 57 locomotion 57 Archaeopteryx 56 mice lacking 56 lamina 56 setae 56 epididymis 56 vertebrates 55 motile 55 mammalian 55 forelegs 55 filamentous 55 pterosaurs 55 mandibles 55 oscillatory 55 collagen fibers 55 musculature 55 Caenorhabditis elegans 55 multicellular organisms 55 inchworm 54 pharyngeal 54 Diplodocus 54 hominins 54 pterosaur 54 homolog 54 ventral 54 nematode worms 54 cortical bone 54 ganglion 53 protuberances 53 testis 53 aortas 53 theropods 53 atherosclerotic lesions 53 cranial nerves 53 morphological 53 osseous 53 multicellular 53 contractile 53 kyphosis 53 dorsal 53 melanogaster 53 mouthparts 53 H. erectus 53 morphology 53 Tiktaalik 52 mammalian brain 52 canine teeth 52 feathered dinosaurs 52 midline 52 flagellum 52 fruit fly Drosophila 52 tracheal 52 xenograft 52 fetlock joint 52 myosin 51 Indohyus 51 intervertebral disc 51 angiosperms 51 featherless 51 chondrocytes 51 amyloid fibrils 51 gaits 51 subfamily 51 anatomical structures 51 bipedal 51 distal 51 occipital 51 hypertrophic 51 IGF1 51 tibial 51 mantis shrimp 51 actin filaments 51 genetically altered mice 51 mandible 51 cusps 51 morphologies 51 ipsilateral 51 conformational 51 humerus