Respiratory System

What is the primary reason we need to breathe?

• To digest food

• To absorb nutrients

• To perform exercises

• To obtain oxygen

What is the first part of the body that air passes through when we breathe in?

• Trachea

• Lungs

• Mouth

• Nostrils

What is the function of the tiny hairs in our nostrils?

• To produce mucus

• To block dust particles

• To detect smells

• To warm the air

What are the branches of the Trachea called?

• Alveoli

• Bronchi

• Diaphragm

• Cilia

How many lobes does the right lung have?

• One

• Four

• Three

• Two

What is the main function of the alveoli?

• To produce oxygen

• To exchange gases

• To filter air

• To move mucus

What happens to the diaphragm when you breathe in?

• It relaxes

• It moves upwards

• It contracts

• It hardens

Which muscle separates the chest cavity from the abdominal cavity?

• Bronchi

• Diaphragm

• Lungs

• Heart

Which organs are capable of floating on water?

• Heart

• Lungs

• Kidneys

• Liver

How many times does a person breathe approximately in one day?

• 20,000 times

• 10,000 times

• 15,000 times

• 25,000 times