Immunity

3. a substance that cause an allergic reaction
4. a reaction when body reacts to something that's normally harmless like pollen, dust or animal fur
6. release histamine to initiate inflammation
7. most abundant leukocyte; phagocytic; lives 1-2 days
9. a process white blood cells engulf the entire pathogens
10. the precursor of macrophages;
11. most of these cells reside in the lymphoid tissues

1. a group of responses to a tissue irritant marked by signs of redness, heat, swelling, and pain
2. substances that trigger immune responses
5. a type of protein molecule with immune function that is made exclusively by B cells
8. associated with allergic reactions and parasitic infestations