Organs are specialized structures within living organisms that perform specific functions essential for survival. In humans, organs such as the heart, lungs, and liver work together to maintain homeostasis and support life. Each organ is made up of tissues that collaborate to carry out these vital tasks. The study of organs is crucial in fields like medicine and biology, as understanding their functions helps in diagnosing and treating various diseases. For instance, the kidneys filter blood to remove waste, while the brain controls bodily functions and processes information, highlighting the complexity and interdependence of organ systems.