Create a free account!

When you create an account, we'll save your progress. Plus, you'll have access to some cool tools, like reports, assignments, gradebook, and awards.

Below is a diagram of the organization of structures in a dog, from simple to complex.

Which of the numbered structures represents a tissue?

An organ system?

An organ?

An organism?

(For each response, type “1”, “2”, “3”, or “4”)

Correct!