Across
- 3. The immune system provides___ from infections
- 5. If too much or not enough lymph is produced this may occur
- 7. an organ that lymphocytes develope and mature
- 8. An animals adaptive ability to ___ depends on its DNA structure
- 9. Red bone marrow ___ new cells
Down
- 1. A red substance consisting of connective tissue, blood vessels, and cells that make erythrocytes
- 2. The Thymus produces ___
- 3. Disease causing germs
- 4. a gland of the thoracic area
- 6. Something that engulfs pathogens or toxins that try to enter the bloodstream