А. Present Indefinite

À. It's the main organ of the respiratory tract

Б. It's the main organ of the Alimentary tract

В. It's the main organ of the Nervous System

Г. It's the main organ of the Urinary System

Д It's the main organ of Cardiovascular System
449. Answer the question: Where are the lungs located ?
À. The lungs are located in the lateral cavities of the chest

Б. The lungs are located in the right side of the chest

В. The lungs are located in the left side of the chest

Г. The lungs are not located in the lateral cavities of the chest

Д The lungs are located in the middle of the chest

450. Answer the question: What has each lung?

А. It has the base, apex, two borders and two surfaces

Б. It has the base, apex, three borders and three surfaces

В. It has the base, apex, two borders and one surface