Related by context. Frequent words. (Click for all words.) 65 gastrointestinal tract 64 myelin sheath 63 nerve cells 63 blood vessels 63 digestive tract 61 mucosa 61 epithelial cells 61 GI tract 60 cell membranes 60 muscle tissue 60 intestines 60 connective tissues 59 intestine 59 tissues 59 fibrin 58 intestinal tract 58 epithelium 58 macrophage 58 nerve fibers 57 duodenum 57 extracellular matrix 57 vasculature 56 immune cells 56 epidermis 56 cell membrane 56 fatty tissue 56 tissue 55 endothelial 55 dermis 55 collagen 55 proteins 55 soft tissues 55 capillaries 55 lymphatic system 55 enzyme 55 axons 55 tumor cells 54 epithelial 54 fibroblasts 54 myelin 54 cancerous cells 54 malignant cells 54 skeletal muscles 54 cell adhesion 54 pancreas 54 connective tissue 54 small intestine 54 dermal 54 lung tissue 54 hair follicles 54 elastin 54 diseased cells 54 osteoblasts 54 enzymes 53 leukocytes 53 autophagy 53 membrane 53 peripheral nerves 53 artery walls 53 intestinal 53 mucous membranes 53 mucus 53 articular cartilage 53 photoreceptors 53 abdominal wall 53 pancreatic cells 53 T lymphocytes 53 clot formation 53 endothelial cells 53 necrotic 52 endometrium 52 muscle fibers 52 esophagus 52 bile ducts 52 salivary glands 52 enzymatic 52 glial cells 52 urinary tract 52 fibrils 52 plasma membrane 52 protein 52 glutamine 52 skeletal muscle 52 glycoprotein 52 molecule 52 inflammation 52 retinal cells 52 colon 52 cells 52 neutrophils 51 bacteria 51 hair follicle 51 nerve endings 51 cartilage 51 microtubules 51 molecules 51 digestive 51 liver 51 lipids 51 motor neurons 51 membranes