Related by context. Frequent words. (Click for all words.) 79 axon 75 nerve fibers 74 nerve cells 69 neurons 67 microtubules 65 motor neurons 65 neuron 64 cilia 64 neuronal 63 astrocytes 62 myelin 62 endothelial cells 61 vesicles 61 filaments 60 fibroblasts 60 blood vessels 60 epithelial cells 59 progenitor cells 59 proteins 58 synapse 57 cell membrane 57 actin 57 synapses 56 inhibitory 56 cortex 55 mitochondria 55 cortical 55 C. elegans 55 intracellular 55 tumor cells 55 synaptic 55 molecules 55 cerebellum 55 cells 54 dendritic cells 54 cytoskeleton 54 capillaries 53 neural stem cells 53 tissues 53 muscle fibers 53 cell membranes 53 nerve endings 53 autophagy 53 messenger RNA 53 malignant cells 53 receptors 53 acetylcholine 53 mammalian cells 52 extracellular matrix 52 cytoplasm 52 transcription factors 52 immune cells 52 signaling pathway 52 molecule 52 mRNA 52 cochlea 52 nuclei 51 connective tissue 51 spinal cord 51 amyloid plaques 51 epithelial 51 muscle tissue 51 macrophages 51 signaling pathways 51 protein synthesis 51 glutamate 51 hair follicles 51 plasticity 51 membrane 51 nanowires 51 nanotubes 51 skeletal muscle 51 neurotransmitter 50 hypothalamus 50 RNAs 50 subunits 50 neurotransmitters 50 peptides 50 lipids 50 neural 50 chromatin 50 epidermis 50 protein 50 visual cortex 49 cytokines 49 distal 49 ventricles 49 zebrafish 49 optic nerve 49 yeast cells 49 nanotube 49 microRNAs 49 mammalian 49 filament 49 ion channels 49 BDNF 49 VEGF 49 tissue 49 collagen 48 amyloid beta 48 lymphocytes