What is made up of two or more organs performing similar functions?

The correct answer is the concept of an organ system, which consists of two or more organs that work together to perform complex functions necessary for the body’s overall operation. For example, the digestive system includes various organs such as the stomach, intestines, and liver, all of which collaborate to break down food, absorb nutrients, and eliminate waste.

This hierarchical organization is essential for maintaining homeostasis and enabling specialized processes within multicellular organisms. The organs within an organ system are interdependent, which allows them to function in a coordinated manner, efficiently fulfilling the physiological requirements of the body.

In contrast, an organ alone refers to a single structure that can perform a specific function, while tissues are groups of similar cells performing a common function. A cell constitutes the most basic unit of life, capable of performing all necessary biological processes independently but is not made up of multiple organs. Understanding these distinctions highlights the complexity and interrelated nature of biological systems in anatomy and physiology.