PSLE Science: Fish Respiratory System Quiz

What is the main topic discussed in the video?

• The nervous system of reptiles

• The digestive system of birds

• The respiratory system of a fish

• The circulatory system of mammals

What is the primary function of the gills in fish?

• To filter food from water

• To help the fish swim faster

• To exchange gases with the water

• To protect the fish from predators

How do blood vessels in the gills aid in gaseous exchange?

• By reducing the surface area for exchange

• By increasing the surface area for exchange

• By storing oxygen for later use

• By preventing water from entering the bloodstream

Which statement about the gills is incorrect?

• Gills are protected by a cover

• Gills have a rich supply of blood vessels

• Gills absorb water containing dissolved oxygen

• Gills release carbon dioxide into the water

What happens to carbon dioxide in the fish's blood when it reaches the gills?

• It is converted into oxygen

• It is released into the water

• It is absorbed into the bloodstream

• It is stored in the gills