salivary gland surface sublingual in the human mouth - top view 3d

absorption antibody bacteria body cancer carcinoma cavity chemotherapy colonoscopy digestion digestive duodenum eat epithelium esophagus exocrine fluid gastric gastrointestinal gland gut hygiene illustration intestinal jaw juices lateral melanoma metastasis microvilli mouth mucus nutrition oral parasympathetic parotid salivary smear smelling squamous stomach sublingual submandibular swallowing swollen tasting throat tissue tract tumor ulcer villi walls