Growth of chick embryos in polyethylene bags.
D000818:Animals; D002642:Chick Embryo / Q000254:growth & development*; D004777:Environment; D005321:Extraembryonic Membranes; D008567:Membranes, Artificial; D011095:Polyethylenes; D012828:Silicones
D008567:Membranes, Artificial; D011095:Polyethylenes; D012828:Silicones