Artificial embolisms were produced in chick embryos by injecting small mouse liver cell particles in an extraembryonal vein. 1–10 h after the injection the embryos were fixed, and serial sections were examined by light microscope. Most of the obstructed vessels were later recanalized. All of the emboli were surrounded by thrombocytes and partly fixed on the vessel wall. The smaller of the injected particles were lying outside the vessels in the neighboring mesenchyme. The significance of thrombocytes for this transport mechanism is discusse
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