Heart

A large muscular organ about the size of a fist. It pumps and circulates blood throughout the body.

Liver:

A large gland connected to the digestive system that filters out toxins. It contains glycogen. It produces bile. It helps in the digestion of food.

Kidney:

The two kidneys are like a bin. They filter the blood and remove waste.

net:

The two kidneys in the human body are separate, not together like in this picture.