Final answer:
The lymph is the protein-containing fluid within the lymphatic vessels. The spleen stores blood platelets and filters blood. The thoracic duct receives lymph from most of the body.
Step-by-step explanation:
The protein-containing fluid within the lymphatic vessels is called lymph.
The spleen stores blood platelets and filters blood, capturing pathogens and antigens. It contains red pulp which stores blood and white pulp rich in lymphocytes that remove antigen-coated bacteria from the blood.
The thoracic duct is the largest lymphatic vessel that receives lymph from most of the body.
Lymph nodes are small, bean-shaped organs located throughout the body and are intimately associated with lymphatic vessels. They contain germinal centers rich in B and T lymphocytes and also have macrophages and dendritic cells for antigen presentation.
Peyer's patches are isolated clusters of lymph follicles found in the wall of the small intestine.
A dendritic cell captures antigens and brings them back to lymph nodes.