The path that fluid takes as it enters a lymphatic capillary is through
A. spaces between capillary endothelial cells that are arranged as one-way flaps.
B. active transport protein pumps on endothelial cell membranes.
C. pores (fenestrations) in the cells of the capillary wall.
D. vesicles that move the fluid across the cell (transcytosis).
E. cell membrane leakage channels that allow diffusion.
Answer: A
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