Related by context. Frequent words. (Click for all words.) 78 gastrointestinal tract 72 digestive tract 67 intestinal tract 64 small intestine 63 intestines 63 mucosa 62 intestine 61 nasal cavity 60 digestive 60 salivary glands 59 duodenum 58 esophagus 58 gastrointestinal 58 nasal passages 58 bowel 58 bloodstream 57 urinary tract 57 respiratory tract 57 epithelium 57 soft tissues 56 circulatory system 56 blood vessels 56 intestinal 56 cell membranes 56 cell membrane 55 macromolecules 55 dermis 55 urethra 55 rumen 55 motility 55 abdominal cavity 55 peripheral nerves 54 mucous membranes 54 spinal canal 54 absorb nutrients 54 secretion 54 upper airway 54 muscle tissue 53 colon 53 bile ducts 53 pancreas 53 mucosal 53 digestive enzymes 53 esophageal 53 inflammation 52 bladder 52 vasculature 52 lymphatic system 52 connective tissues 52 epithelial cells 52 intestinal bacteria 52 gastrointestinal GI 52 gastric 52 excretion 52 capillaries 52 gland 51 epidermis 51 skeletal muscles 51 Intestinal 51 thyroid gland 51 lymph 51 uterus 51 connective tissue 51 adrenal gland 51 oral cavity 50 colonic 50 left ventricle 50 intracellular 50 gastro intestinal 50 tissues 50 thrombus 50 plasma membrane 50 uterine 50 prostate gland 50 edema 50 glutamate 50 secretions 50 thyroid hormones 50 digestion 50 endothelial 50 sinuses 50 prostaglandins 50 nerve endings 50 cerebrospinal fluid 50 soft tissue 49 metabolized 49 optic nerve 49 trachea 49 myelin sheath 49 ulceration 49 metabolic processes 49 cysteine 49 abdominal wall 49 gastric ulcers 49 tumor cells 49 diseased tissue 49 cell adhesion 49 diseased cells 49 reflux 49 extracellular 49 nerve fibers