1. Lymphatic and Immune

2. What are lymph nodes?
A mass of lymphatic tissue that helps remove bacteria, tumor cells, etc…

3. What is lymph?
The watery fluid in the lymph vessels collected from the tissue spaces.

4. List four lymphoid organs.
spleen
thymus gland
tonsils
Peyer's patches

5. List four mechanisms that aids lymph return:
milking action of skeletal muscles
pressure changes within the thorax
smooth muscle contractions within the lymphatic vessels
presence of valves within the larger lymph vessels

6. What organ Filters and cleanses the blood of bacteria, viruses, and other debris
Spleen

7. What lymph organ programs T cells and functions at peak levels only during youth is the
Thymus

8. The body's first line of defense against the invasion of disease-causing microorganisms is:
skin and mucous membranes

9. The process by which neutrophils are squeezed through the capillary walls during the inflammatory process is called:
diapedesis