Across
- 2. a blood protein produced in response to a specific antigen
- 3. tube shaped sac attached to and opening into the lower end of the large intestine
- 5. the short term immunity which results from the introduction of antibodies from another person
- 7. small bean shaped structures that filter substances that travel through lymph
- 8. colorless fluid containing white blood cells
Down
- 1. two masses in the back of the throat that filter put germs that enter through the nose and mouth
- 4. being resistant to a particular infectious disease or pathogen
- 6. abdominal organ involved in the production and removal of blood cells and forming part of the immune system