🧬 Part 1: Understanding the Hierarchy

1. Which level of biological organization is the smallest?

Tissue

Cell

Organ

Organism

2. Put the levels of biological organization in order from smallest to largest:

_____ Organism _____ Organ System _____ Cell _____ Tissue _____ Organ

3. Which of the following are examples of organs? (Check all that apply)

Heart

Muscle tissue

Brain

Digestive system

Stomach

4. The respiratory system is made up of multiple ____________ working together.

Cells

Tissues

Organs

Organisms

🔬 Part 2: Applying Your Knowledge

5. Explain how muscle cells work together to help your body move. Use at least three levels of organization in your answer.

6. What might happen to an organism if one of its organ systems stopped working properly? Give a specific example.

7. Fill in the blanks to complete the biological hierarchy:

Many __________ of the same type group together to form __________. Different types of these then combine to make __________. Several of these work together as an __________ __________. All the systems together make up a complete __________.

🎨 Part 3: Design Challenge

8. In the space below, draw and label a simple diagram showing how cells organize into tissues, then organs, then organ systems, and finally an organism. Use the digestive system as your example.

9. Why is it important for living things to be organized in this hierarchy? What advantages does this organization provide?