Lymphatic System

1. Effector cells for T cells that produce toxic agents to kill their targets.
3. Site of maturation for T cells.
4. Site of origin for B and T cells.
8. Tonsil located on either side at posterior end of the oral cavity.
11. Secondary organ that gathers and removes pathogens entering the pharynx in food or inhaled air.
13. Tonsil with lymphoid follicles at base of tongue.
14. Tonsil located on posterior wall of the nasopharynx.
15. This system returns fluids that leaked from the vascular system back to the blood.
16. These drain large areas of the body.

2. Surface receptors for B cells.
5. Effector cells for B cells.
6. Tonsil that surrounds openings of auditory tubes into the pharynx.
7. Effector cells for T cells that suppress immune response.
9. This duct receives lymph from a majority of the body.
10. Effector cells for T cells that stimulate B cells to make antibodies and T cells to become active.
12. Secondary organ that provides a site for lymphocyte proliferation and immune surveillance and response.
13. Secondary organ where macrophages remove and destroy microorganisms and other debris to prevent them from being delivered to the blood.
17. This lymphatic duct drains lymph from the right upper limb, right side of the head, and the thorax.