Answer the following question given this paragraph: 

Like animals, plants have organs that are specialized to carry out complex functions. An organ is a structure composed of more than one type of tissue. A tissue, in turn, is a group of cells of the same kind that do the same job. In this lesson, you will read about the tissues that do the important work of plants. The cells that make up plant tissues are described first.


Q: What is the term for a structure composed of more than one type of tissue?


A:
organ