Anchoring filaments of the lymphoid system are attached to which structures?
a. Cords of Billroth in the spleen
b. Macrophages of the red pulp of the spleen
c. The capsule of lymph nodes
d. The connective tissue surfaces of lymphatic capillaries
e. Tips of valve leaflets in lymphatic vessels
ANS: D
The easily collapsed, low-pressure lymphatic capillaries are held open by anchoring filaments that attach to surrounding connective tissue elements.
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