Across
- 2. What is the smallest unit of matter?
- 4. What is the primary cause of immunodeficiency?
- 7. What is the first line of defense?
- 8. What is the primary immune organ?
- 9. What is the center of an atom called?
- 10. Which nutrient supports immune function?
Down
- 1. Which technique involves sealing food in airtight containers?
- 3. What type of electron transition releases energy?
- 5. What protects the body against infections?
- 6. Which organ filters pathogens from blood?