The broad ligament and .'paraovarian sac tissuek in various areas of the paraovarian lymphatic plexus after administration of carbon particles and latex bieads were examined for absorption from peritoneal and sac cavities in pigs during the estrous cycle. 30 min after the introduction of carbon particles, lymphatic pathways were stained black through all phases of the estrous cycle, however, near the uterine horn, oviductal isthmus and subovarian areas of the lymphatic plexus, staining occurred within 1-2 min. SEM-study revealed that latex beads (0.8 urn in diameter) had reached the lumen of lymphatic lacunae (or large lymphangions) within 20-30 min. The latex beads penetrated through stomatal orifices, small pores or fenestrations and epithelial-free communications with connective tissue in sac walls, as well as through the macula cribriformis prelymphatic channels. Their absorption was area-dependent; being greatest in those areas where carbon particles were also greatest.
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