Small, bean-shaped structures lined along the lymphatic vessels throughout the body.

The lymphatic organ located below the diaphragm in the abdomen filters blood.

The process by which a cell engulfs and destroys foreign matter using lysosomes.

Type of leukocytes that morphs into macrophages when they migrate out of the main circulation to the surrounding tissue.

Histamine reduces blood circulation at an inflamed site.

Cells producing immunoglobulins are called ______.

This is released by virus infected cells which signals leukocytes to move in for destruction.

Lymphatic tissues located underneath the linings of respiratory tract, digestive tract, or any mucous surface that open to the outside world.

IgA appears first during exposure to antigens.

Which of the following is found in tears, breast milk, and mucous membrane.

These antibodies attach to mast cells.

Major Histocompatibility Complex (MHC) is a type of receptor on cell membrane that presents antigens to T cells.