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1. mucosa-associated lymphoid tissue
3. An organ that is part of the lymphatic system, in which T lymphocytes grow and multiply.
5. dense masses of lymphocytes and macrophages
6. A thin tube that carries lymph (lymphatic fluid) and white blood cells through the lymphatic system.
9. small lumps of tissue that contain white blood cells, which fight infection
10. The clear, yellowish, fluid part of the blood that carries the blood cells.
14. an interconnected system of valved, tubular structures that are lined by a combination of epithelial and smooth muscle cells.
15. the main vessel of the lymphatic system

2. any large lymph vessel that forms from the convergence of many efferent lymph vessels
4. tiny vessels found in the tissues of most organs in your body.
5. empty lymph fluid into the venous system
7. two round, fleshy masses in the back of your throat (pharynx)
8. Fluid found in the spaces around cells.
9. a clear-to-white fluid made of: White blood cells, especially lymphocytes, the cells that attack bacteria in the blood and body tissues.
11. form a single cell layer that lines all blood vessels and regulates exchanges between the bloodstream and the surrounding tissues.
12. a bacterium, virus, or other microorganism that can cause disease
13. makes lymphocytes, filters the blood, stores blood cells, and destroys old blood cells.