What is this?
brain
What is this?
liver
What is this?
kidneys
What is this?
urine
What are these?
intestines
What is this?
blood
What is this?
stomach
What is this?
feces
What is this?
oesophagus
What is this?
heart
What are these?
lungs
What are these?
teeth
What is this?
tongue