Related by context. Frequent words. (Click for all words.) 70 mucus membranes 65 respiratory tract 64 mucous membrane 62 mucosa 60 conjunctiva 59 gastrointestinal tract 59 nasal passages 59 sebaceous glands 56 mucous 56 secretions 55 digestive tract 55 bleeding gums 55 respiratory secretions 54 GI tract 54 salivary glands 54 mucosal 54 dermis 54 capillaries 54 bronchial tubes 54 epithelial cells 53 mucus 53 skin irritations 53 sebum 53 urushiol 53 bloodstream 53 epithelium 53 epidermis 52 respiratory droplets 52 upper respiratory tract 52 bronchi 52 pharynx 52 cell membranes 52 intestinal tract 52 cell membrane 51 applied topically 51 nasal cavity 51 sneezing coughing 51 itchy skin 51 blood vessels 51 ulcerations 51 nasal passage 51 oral cavity 51 Avoid touching 50 bile acids 50 connective tissues 50 skin 50 sweat glands 50 oxidizes 50 secretion 49 skin irritation 49 nasal discharge 49 throat irritation 49 dermal 49 Allergic reactions 49 sun ultraviolet rays 49 glands 49 dentin 49 salicylic acid 49 redness 49 epithelial cell 49 pruritus 49 eye irritation 49 inactivates 49 blepharitis 49 itchiness 49 immune cells 49 tissues 49 soft tissues 49 intestines 49 skin ulcers 49 moisturizes 49 lymphatic vessels 48 histamine 48 skin lesions 48 skin rashes 48 rashes 48 bacteria 48 digestive enzymes 48 collagen 48 fever nausea 48 pores 48 topical cream 48 peripheral nerves 48 fungal spores 48 cold sores 48 skeletal muscles 48 intestinal tracts 48 coughing sneezing 48 alveoli 47 membranes 47 cutaneous 47 canker sores 47 Inhaled 47 include fever headache 47 nerve cells 47 bacteria fungi 47 naturally occurring bacteria 47 urticaria 47 sores 47 digestive tracts 47 contact dermatitis