RT Journal Article SR Electronic T1 Sea Urchin Response to Foreign Substances JF Science JO Science FD American Association for the Advancement of Science SP 1243 OP 1245 DO 10.1126/science.161.3847.1243 VO 161 IS 3847 A1 Hilgard, Henry R. A1 Phillips, John H. YR 1968 UL http://science.sciencemag.org/content/161/3847/1243.abstract AB An assessment of the response of Strongylocentrotus purpuratus to substances injected into the coelom shows that (i) foreign molecules are cleared from the coelomic fluid more rapidly than native molecules, (ii) coelomocytes can respond selectively to albumins of human and bovine origin, and (iii) immunization attempts fail to elicit accelerated coelomocyte uptake or accelerated clear-with antigen.