Related by context. Frequent words. (Click for all words.) 61 collagen fibers 57 interfacial 56 filaments 56 nacre 55 helices 54 keratin 54 micelles 53 protrusions 53 DNA strands 53 spider silk 53 forelimbs 52 mandibles 52 flagella 52 hind limbs 52 fibers 52 outer layer 52 protozoan 52 tubules 52 microstructures 51 SWNTs 51 baleen 51 fibrils 51 magnetic particles 51 cilia 51 melanosomes 51 morphology 51 fibrin 51 gecko 51 pleura 51 biological molecules 50 axons 50 hydroxyapatite 50 membranes 50 stromal 50 nanotubes 50 sea squirts 50 arthropods 50 dinoflagellates 50 dendrites 50 striations 50 arthropod 50 epithelial cells 50 exoskeletons 50 nanowires 50 hairs 50 graphene sheets 50 hydrogel 50 anemone 49 nanotube 49 substrate 49 jaw muscles 49 membrane 49 tufts 49 protein complexes 49 photonic crystal 49 nanoscopic 49 fatty tissue 49 alternating layers 49 dentin 49 polymeric 49 dimer 48 nanometers thick 48 calcite 48 nanostructure 48 lithosphere 48 dorsal fins 48 copepods 48 multicellular organisms 48 whorls 48 sea anemone 48 microcapsules 48 roundworms 48 multicellular 48 excitons 48 marine invertebrates 48 fibroblasts 48 nerve cells 48 globular 48 air sacs 48 lobed 48 nanofibers 48 nerve fibers 48 vortices 48 neurones 48 cuticle 48 spiny 48 leaf litter 48 canine teeth 48 extracellular matrix 48 vertebrate 47 organisms 47 pterosaurs 47 clumps 47 single celled 47 silicone rubber 47 dorsal fin 47 macromolecules 47 ant colonies 47 vesicle 47 fungal spores 47 dimpling