🔬 Part 1: Understanding Biological Organization

1. Which level of biological organization comes FIRST in building a living organism?

Tissue

Cell

Organ

Organ system

2. What is formed when many similar cells work together?

An organ

A tissue

An organism

An organ system

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

Heart

Muscle tissue

Stomach

Brain

Blood

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

_____ Organism _____ Tissue _____ Cell _____ Organ _____ Organ System

📝 Part 2: Applying Your Knowledge

5. Fill in the blanks using the vocabulary words: cells, tissues, organs, organ systems, organism

Your heart is an __________ made up of different types of __________ such as muscle and nerve tissue. These tissues are built from millions of __________. Your heart works with your blood vessels to form the circulatory __________ __________. All of your organ systems work together to keep you alive as a complete __________.

6. Explain how the failure of one organ can affect an entire organ system. Give a specific example.

7. Choose ONE organ system and describe how cells build up to create that system:

🎨 Part 3: Create Your Model

8. In the space below, draw and label a conceptual model showing how cells organize into tissues, tissues into organs, organs into systems, and systems into an organism. Use arrows to show the connections.

9. Write a caption for your model explaining why this organization is important for living things: