Organes are specialized structures within living organisms that perform specific functions essential for life. In humans, for example, organs like the heart, lungs, and liver work together to maintain bodily functions such as circulation, respiration, and metabolism. Each organ is made up of different types of tissues that collaborate to carry out its role. For instance, the heart consists of muscle tissue that pumps blood, while the lungs contain respiratory tissue that facilitates gas exchange. Understanding how these organs function helps us appreciate the complexity of biological systems.