Your nose and mouth ... air.
inhale
These are the ... .
triceps
This is the ... system.
muscular
Your ... is a muscle that helps your lungs to work.
diaphragm
Your ... provide oxygen for your blood.
lungs
These are the ... .
abdominal muscles
This is the ... .
calf muscle
Your muscles ... .
all the three options are correct
help you to speak and eat
help your heart to move blood around your body
protect your skeleton and organs
Your ... takes air to your lungs.
windpipe
These are the ... .
biceps
Your ... system enables you to breathe.
respiratory
This is the ... .
thigh muscle
Your nose and mouth ... carbon dioxide and other gases.
exhale