What is the function of an organ?

• A. A group of tissues that perform a single function.
• B. A group of cells forming tissues.
• C. A group of organs working together with a specific function.
• D. The discipline dealing with good and bad and moral duties.

Answer: (A)

An organ is a structure made of different tissues that work together to perform a specific function in the body. The tissues coordinate to carry out that job, such as the heart’s muscle tissue, nerves, and connective tissues all collaborating to pump blood. The description that fits best is a group of tissues that perform a single function, because it captures how an organ is built from multiple tissues working together to achieve a particular task. The other options describe tissue itself, an organ system, or a field of study (ethics), which are not what an organ is.