Which SYSTEM is it?
the digestive system
Which SYSTEM is it?
the respiratory system
What is it?
bladder
What is it?
mouth
What is it?
heart
What is it?
nose
Which SYSTEM is it?
the reproductive system
What is it?
intestine
What is it?
kidneys
What is it?
trachea
Which SYSTEM is it?
the circulatory system
What is it?
blood vessels
What is it?
urethra
Which SYSTEM is it?
the excretory system
What is it?
lungs
What is it?
esophagus
What is it?
stomach