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