HUMAN RESPIRATION YEAR 4

What is the organ for human respiration?

• lung
• trachea
• gills
• heart

What is the gas inhaled by human?

• carbon dioxide
• oxygen
• carbon monoxide
• air

What will happen if there is no oxygen in Earth?

• Living things will become bigger.
• Living things will inhale carbon dioxide.
• Living things will die.
• Nothing will happen to the living things.

What is the gas exhaled by human?

• Oxygen
• Carbon dioxide
• Carbon monoxide
• Nitrogen

Choose the correct path of oxygen inhaled by human the our body.

• lungs -> nose -> trachea 
• trachea -> nose -> lungs
• nose -> trachea -> lungs
• lungs -> trachea -> nose