Animal Respiration L25.2

Which respiratory structure in land invertebrates is made of parallel, sheetlike layers of thin tissues that contain blood vessels?

• Alveoli

• Tracheal tubes

• Mantle cavity

• Book lungs

What is the main respiratory organ used by terrestrial vertebrates such as reptiles, birds, and mammals?

• Lungs

• Trachea

• Alveoli

• Gills

In which group of animals do lungs branch extensively, and air passages branch and rebranch, ending in bubblelike structures called alveoli?

• Amphibians

• Reptiles

• Mammals

• Birds

Why do mammals require a large surface area with which to process oxygen?

• To reduce carbon dioxide levels

• To process the large amount of oxygen required by their high metabolic rates

• To store excess oxygen

• To increase lung capacity

In birds, how is the airflow in the lungs structured to prevent stale air from getting trapped?

• Air enters and leaves through spiracles

• Air flows mostly in only one direction

• Air flows in and out through the same air passages

• Air is pumped past gill filaments

What is the main respiratory organ used by aquatic mammals such as whales?

• Alveoli

• Gills

• Trachea

• Lungs

Why do dolphins breathe with lungs instead of gills?

• Because they have evolved lungs

• Because they are mammals

• Because gills are not efficient for gas exchange

• Because they live in water

What is the primary respiratory organ used by fish for gas exchange?

• Gills

• Lungs

• Trachea

• Alveoli

How do insects breathe and exchange gases with their environment?

• Through gills

• Through spiracles and tracheal tubes

• Through lungs

• Through skin

What is the respiratory organ used by earthworms for gas exchange?

• Alveoli

• Tracheal tubes

• Book lungs

• Diffusion through skin