A(n) organ<>is<>a structure that is composed of one or more types of tissues$$$a structure<>is composed<>of one or more types of tissues
Organs are units of structure and function that are composed of at least two, and usually all four, primary tissues.
A(n) organ is a structure that is composed of one or more types of tissues.
What is a structure that is composed of one or more types of tissues?