Related by context. Frequent words. (Click for all words.) 83 tissue 64 epithelial cells 62 cells 62 proteins 60 muscle tissue 59 blood vessels 59 stem cells 59 tumor cells 57 nerve cells 57 immune cells 57 fibroblasts 57 gastrointestinal tract 57 enzymes 56 membranes 56 endothelial cells 56 soft tissues 55 lymphocytes 55 malignant cells 55 fatty tissue 55 progenitor cells 55 cancerous cells 55 mammalian cells 55 lipids 55 adipose tissue 54 internal organs 54 antigens 54 motor neurons 54 capillaries 54 hair follicles 53 skeletal muscle 53 digestive tract 53 cell membrane 53 extracellular matrix 53 axons 53 secretions 53 collagen 53 epithelial 53 islet cells 52 breast tissue 52 protein 52 intestines 52 astrocytes 52 antibodies 52 bacteria 52 cell membranes 52 mucus 52 neural stem cells 52 pancreas 52 platelets 52 follicles 52 cartilage 52 membrane 52 epidermis 51 biomolecules 51 lungs 51 molecules 51 prions 51 uterus 51 lung tissue 51 organs 51 nerve fibers 51 nerve endings 50 Cells 50 neutrophils 50 cytokines 50 cerebrospinal fluid 50 macrophages 50 GI tract 50 intestine 50 placenta 50 glands 50 ovary 50 organisms 50 liver 49 respiratory tract 49 connective tissue 49 hair follicle 49 mucous 49 micro organisms 49 vesicles 49 small intestine 49 peptides 49 microorganisms 49 muscle fibers 49 nanoparticles 49 enzyme 49 uterine 49 mitochondria 49 mammalian 49 tumors 49 mucous membranes 49 neurons 49 fluids 49 dendritic cells 49 myelin 48 intestinal tract 48 ovaries 48 receptors 48 bloodstream 48 malignant tumors 48 testes