Select your answer:
Topics:
Mutations Respiratory Your Body Hygiene and Nutrition Oral Surgery Human Eye and Colourful World Transport system in Living Things (Human) Sarcomere Anatomy Teeth and Microbes Carbohydrate Metabolism Lungs Atoms and Radioactivity Nervous System and Special Senses The Brain Our Control Center HistologyOther quiz:
Cardiac & Diseases of Blood Flow › ViewPrimary HTN accounts for ____% of cases and is caused by _____
A. 80%; unknown origins
B. 20%; medications
C. 80%; medications
D. 20%; unknown origins
Body Systems › View
The two main branches from the trachea (one to each lung)
A. bronchi
B. alveoli
C. capillaries
D. bronchioles