Organ

An organ is a body part made of different tissues working together to do one specific job.

• How an organ is built: An organ is not made of just one kind of cell. It contains different tissues (like muscle tissue, nerve tissue, and connective tissue) arranged in a useful way.
• Why organs matter: Each organ has a clear function that helps the body stay alive—such as breaking down food, pumping blood, or exchanging gases.
• Example (stomach): The stomach has muscle tissue to churn food, glandular tissue to release digestive juices, and nerve tissue to control movements—together they help in digestion.
• Organs work in teams: Most organs do not work alone. They cooperate with other organs to form an organ system (for example, the stomach works with the mouth, intestines, liver, and pancreas in digestion).
• Helpful analogy: Think of an organ like a “department” in a school—different staff members do different tasks, but together they achieve one main goal.

So, an organ is a step above tissues in organisation: it is where different tissues combine to perform a complete, useful function.