Breathing gives out carbon-di-oxide and takes in ____

Keep practicing — related questions

• The air we breathe consists ____ nitrogen, oxygen, carbon dioxide, and several other gases.
• Animals inhale _______ gas; while exhale ________ gas.
• The two main gases that humans breathe are oxygen and ___________.
• When heated with oxygen, carbon burns to produce heat and ___________ gas.
• Respiration
• Air consists mainly of:
• CO2
• The final product of β-oxidation of a 16-carbon fatty acid is ________. The metabolism of fatty acids occur...