Question

which of the following is the largest mass of lymphoid tissue and serves to filter the blood? lymph nodes spleen peyers patches tonsils

Explanation:

The spleen is the largest mass of lymphoid tissue in the body and filters the blood, removing old or damaged blood cells and pathogens. Lymph nodes filter lymph, Peyer's patches are in the small - intestine and filter lymph from the digestive tract, and tonsils are in the throat and filter lymph from the head and neck area.

Answer:

Spleen