Description : Allarltois of Embryo helps in - (1) digestion (3) excretion (2) respiration (4) protection
Last Answer : (3) excretion Explanation: The allantois is the sac-like extraembryonic membrane that removes waste from the embryo. As the embryo grows, so does the allantois, eventually pressing against the chorion. ... side the eggshell. In addition, the allantois also serves as a disposal site for uric acid.