axilla blood breast bronchus buccal mucosa caecum cervicovaginal secretion colon colonic mucosa dental plaque dorsum ear elbow endocervix external naris feces gingiva mastoid lymph node head hypopharynx ileum internal naris lower lip lower part of vagina lung mesenteric lymph node meconium hard palate milk mouth mucosa mucosa of small intestine mucosa of stomach nasal cavity nasopharynx neck nose oral gland oropharynx pair of nares palatine tonsils placenta posterior fornix of vagina prostate gland secretion rectal saliva skin of body skin of cheek skin of forearm skin of sole of pes small intestine sputum stomach subgingival dental plaque throat tongue urine uterine cervix uterus vagina vagina orifice