This trend within health care has led some patients to feel alienated or degraded

Which of the following is NOT part of the respiratory system?

A) Nasal cavity B) Upper respiratory tract C) Lower respiratory tract D) Middle respiratory tract

A 23-year-old patient presents with multiple small aphthous ulcers in his vestibular mucosa. He also has nodular submucosal swellings in his vestibules and lips. He is losing weight and has oc-casional abdominal pain. Biopsy of the oral nodules shows the presence of small noncaseating granulomas. He should be investigated for the possibility of:

a. Metastatic colorectal cancer b. Tuberculosis c. Behçet's syndrome d. Crohn's disease e. Secondary syphilis