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