Which of the following correctly identifies body structures made of a collection of tissues?

organs
organ systems
super tissues
cells

organs

Explanation: If we take into consideration the structure of the human body we can say that the cells are the smallest biological units. A combination of cells form tissue. The different organs of the body are made of tissue and a group of organs is an organ system. So, a structure made up by a combination of tissues is an organ.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms