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Across 2. Lymph nodes are found concentrated in these areas along with infection fighting white blood cells 3. A type of blood cell that attacks invading germs; the cause of swollen glands 8. Pathogens 9. Small lymphatic organs at the back of the throat & tongue that help the body defend itself agains infection 10. Soft tissue inside of bones where blood cells are produced 11. The cardiovascular system is this type of system because blood remains in vessels that form a closed loop 15. Bacterial infection that can enter the body through the bite or an infected flea 18. System that includes a group of organs & tissues that collect the fluid that leasks from blood & returns it to the blood 20. Body system that transports blood around the body 22. Small, bean-shaped organs that remove pathogens & dead cells from the lymph. 23. This system includes both the cardiovascular system and the lymphatic system 24. A type of cancer that often begins in the lymph nodes; causes swelling in the lymph nodes 25. The lymphatic system is also part of this body system's defense against disease 26. Germs 27. Largest lymphatic organ; white blood cells are stored & mature here; marks germs in the blood as it flows through this organ

Down 1. Parts of the cardiovascular system 4. An organ in the chest; white blood cells made in the bone marrow finish developing here; also part of the endocrine system 5. A type of system where fluids (lymph) can move in and out of vessels 6. Tubes that carry liquids/substances; lymph & blood are two examples 7. Swelling of body tissues caused by a blockage or injury to lymph vessels, leaving lymph vessels unable to drain leading to swelling. 12. Tiny, thin walled blood vessels that absorb fluids, dead cells and germs from around body cells 13. The thinnest & tiniest of the blood vessels; where diffusion of materials into & out of the cell occurs 14. Name for the fluid leaked from the blood vessels that collects in between cells 16. This suffix means"swelling of" 17. Disease caused by threadlike worms called nematodes 19. Fluid that carries gases, nutrients, hormones, enzymes and wastes through the body 21. Swelling of the tonsils caused by an infection