Answer
Tissues are relevant to the definition of an organ because they make up the organs. Tissues are collections of cells working together to a specific function. They bind the body held up as well as provide elasticity and support which is a huge part of every organ. "An organ is a structure composed of two or more tissue types that work together to carry out a particular function." (p.13)
Work Step by Step
"An organ is a structure composed of two or more tissue types that work together to carry out a particular function." (p.13)