Related by context. Frequent words. (Click for all words.) 66 microtubules 65 liposomes 64 cytoplasm 64 cell membrane 63 epithelial cells 61 nuclei 61 intracellular 61 axons 60 endothelial cells 60 molecules 60 epithelium 60 proteins 57 RNA molecules 57 dendrites 57 actin 57 molecule 57 extracellular 57 nerve cells 56 nanocrystals 56 yeast cells 56 tumor cells 56 neurons 56 astrocytes 55 lipids 55 RNAs 55 microspheres 55 axon 55 nanotubes 55 monocytes 55 mammalian cells 55 subunits 55 biomolecules 55 filaments 55 organic molecules 55 macrophages 54 neurotransmitters 54 membranes 54 fibroblasts 54 nerve fibers 53 synapse 53 nanoparticles 53 granules 53 dendritic cells 53 peptides 53 capillaries 53 membrane 53 biofilms 53 mitochondria 52 signaling molecules 52 neutrophils 52 glutamate 52 crystals 52 DNA strands 52 particles 52 progenitor cells 52 receptors 52 epithelial 52 electrons 52 amino acids 51 cells 51 cell membranes 51 malignant cells 51 ligands 51 immune cells 51 messenger RNA 51 autophagy 50 photons 50 hydrogen atoms 50 ligand 50 vasculature 50 ions 50 sacs 50 cilia 50 neurotransmitter 50 neural stem cells 50 atoms 50 quantum dots 50 cytoskeleton 49 chromatin 49 extracellular matrix 49 tissues 49 ovary 49 hydrogel 49 mRNA 49 protein synthesis 49 synaptic 49 blood vessels 49 polymeric 49 cytokines 49 chemical reactions 49 synapses 48 dermis 48 proton 48 nucleotides 48 protein 48 neuron 48 salivary glands 48 reactive oxygen species 48 motor neurons 48 electron 48 biofilm