circulatory and respiratory system class 6 biology

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

The common chamber for oesophagus and trachea is the ________

• Larynx

• Pharynx

• Epiglottis

What is the common chamber for oesophagus and trachea?

• Larynx

• Pharynx

• Epiglottis

During respiration, what do your lungs take in and remove?

• air/oxygen

• oxygen/carbon dioxide

• carbon dioxide/waste

• waste/air

Which organ is responsible for the exchange of gases in the human body?

• Lungs

• Liver

• Heart

• Kidney