1.Water-soluble substances, like ions, cross the capillary wall through either water-filled spaces, called clefts, between the endothelial cells, or through large pores in the walls of fenestrated capillaries.
水溶性物质,如离子,通过的充水空
(裂缝),穿过毛
血管壁或由有孔毛
血管壁的小孔穿过。