Membranes formed during avian embryogenesis that protect the embryo and enable nutrition, respiration, and waste storage: yolk sac, amnion, chorion, and allantois; from about one-third of incubation, the allantois fuses with chorion to form the chorioallantois (allantochorion).
More birds in less time. Give your BAT1 a 43% speed boost with our FREE firmware update!
GET IT TODAY