Related by context. Frequent words. (Click for all words.) 67 nasal passages 65 blood vessels 64 sinuses 63 upper airway 62 airways 62 airway 62 lungs 60 capillaries 60 respiratory tract 59 lung tissue 59 intestines 59 trachea 58 esophagus 58 GI tract 58 urethra 57 pores 57 carotid arteries 57 arteries 57 nasal cavity 57 pharynx 57 mucus 57 bile ducts 57 nostrils 57 air sacs 56 intestine 56 duodenum 55 spinal canal 55 intestinal tract 55 abdominal cavity 55 digestive tract 55 mucous 54 mucosa 54 chest cavity 54 mucous membranes 54 coronary arteries 54 circulatory system 53 gastrointestinal tract 53 secretions 53 ureter 53 aorta 53 artery 53 facial muscles 53 sphincter 52 windpipe 52 diaphragm 52 adenoids 52 salivary glands 52 bladder 52 ear canal 52 epithelium 51 artery walls 51 small intestine 51 glands 51 bloodstream 51 lung 51 fallopian tube 51 tissues 51 left ventricle 51 colon 51 ventricles 51 bowel 51 cerebrospinal fluid 50 blocked arteries 50 fibrous tissue 50 nostril 50 optic nerves 50 pulmonary artery 50 clot 50 uterus 50 cannula 50 abdominal wall 50 peripheral nerves 50 connective tissues 50 hair follicles 49 Left untreated 49 nerve endings 49 internal organs 49 soft tissues 49 coronary artery 49 Arteries 49 sinus 49 airway inflammation 49 atherosclerotic plaque 49 skeletal muscles 49 gums 49 sacs 49 nerve fibers 48 atria 48 inflammations 48 Blood clots 48 adrenal glands 48 clogged artery 47 pancreas 47 absorb nutrients 47 sweat glands 47 clot formation 47 rectum 47 thrombus 47 vagus nerve 47 uterine lining 47 orifices