In an adult, at what angle does the left mainstem bronchus branch from the trachea?

Which of the following is helpful in determining the severity of abdominal injury?

A) Clinical exam findings B) Mechanism of injury C) Patients complaint D) All of the above

Which of the following is NOT a way physicians diagnose blood disorders?

a. Bone marrow biopsy b. Blood tests c. Blood biopsy d. Microscopic examination of blood cells