Lymph nodes
A)filter lymph.
B)contain a network of collagen fibers.
C)serve as auxiliary exchange surfaces for respiratory gases.
D)filter blood.
E)All of the choices are correct.

Question

Quizplus · Accepted Answer

Lymph nodes are small, bean-shaped structures located throughout the body that function to filter lymph, which is a fluid that contains immune cells and waste products. The filtering process removes bacteria, viruses, and other harmful substances, and helps to activate the immune system when necessary.

Lymph Nodes