Match the following terms and definitions. 1. a fluid of lymph and blood that circulates within invertebrates interferons 2. protein cells that assist in fighting infection and disease nephron 3. type of leukocyte that makes up the specific immunity system; capable of building immunity to a disease lymphocyte 4. excretory tubules in insects and spiders that empty into the intestine hemolymph 5. the functioning unit of the kidney that produces urine malpighian tubules 6. tubes in flatworms and earthworms that excrete waste nephridi