Question

1. We breathe in blank
and breath out blank.​

Answer 1

Answer:

oxygen

carbon dioxide

Explanation:

Hope it will help you

Answer 2

We breathe in oxygen and breath out carbon dioxide.

Explanation:

• This exchange of oxygen and carbon dioxide is called respiration.
• The Lungs are the primary organs of respiration in humans and other vertebrates.
• The process starts with the lungs taking in oxygen because our body’s cells need oxygen to live and carry out their normal functions.  
• The lungs also get rid of carbon dioxide, a waste product of the cells.