What statements are true about lymph nodes.?

1. Lymph nodes are small, bean-shaped structures that are part of the lymphatic system.

2. Lymph nodes are located throughout the body, but they are especially concentrated in the neck, armpits, and groin.

3. Lymph nodes filter lymph fluid, which is a clear liquid that contains white blood cells.

4. Lymph nodes trap and destroy harmful substances, such as bacteria, viruses, and cancer cells.

5. Lymph nodes can become swollen and tender when they are fighting an infection.

6. Swollen lymph nodes are often a sign of a cold or flu, but they can also be a sign of a more serious illness, such as cancer.

7. If you have swollen lymph nodes that do not go away within a few weeks, you should see a doctor.