A. Sapporting muscles
B. Intercostal muscles
C. Intertrachial muscles
D. Cardiac muscles

A. Epiglottis
B. Diaphragm
C. Membrane
D. Palat

A. Goblet cells
B. Bronchial cells
C. Tracheal cells
D. Flame cells

A. Trachea
B. Parabronchi
C. Alveoli
D. None of them

A. Lungs
B. Trachea
C. Gills
D. Skin

A. Alveoli
B. Lamellae
C. Bronchi
D. Filaments

A. Trachea
B. Lungs
C. Gills
D. None of them

A. Skin and lungs
B. Trachea and skin
C. Gills and skin
D. Gills and lungs

A. 80-90%
B. 90-100%
C. 70-80%
D. 60-70%

A. Birds
B. Mammals
C. Fishes
D. Amphibians