The document discusses the major organs of the human body, including the brain, lungs, stomach, liver, bladder, heart, and kidneys. The brain controls the entire body. The lungs help with breathing by taking in oxygen. The stomach holds and digests food. The liver filters blood and breaks down toxins. The bladder stores urine before it leaves the body. The heart pumps blood throughout the body. The kidneys filter waste from the blood. Working together, all the organs keep the body alive and functioning.