Final answer:
In amniotic eggs, the yolk sac delivers nutrients, the chorion facilitates gas exchange, the allantois stores waste and aids in respiration, and the amnion offers protection and hydration to the developing embryo.
Step-by-step explanation:
Functions of the Extra-Embryonic Membranes in Amniotic EggsThe amniotic egg is characterized by extra-embryonic membranes that have vital functions for the developing embryo. These membranes include:The yolk sac, which contains the egg yolk and its blood vessels that transport nutrients to the circulatory system of the embryo.The chorion, which is responsible for the exchange of oxygen and carbon dioxide between the embryo and the external environment.The allantois, which serves as a storage site for nitrogenous wastes and also facilitates respiration.The amnion, which protects the embryo from mechanical shock and helps to maintain a hydrated environment.These membranes provide crucial support as the embryo develops within the amniotic egg, allowing amniotes to inhabit diverse environments.
The three extra-embryonic membranes present in amniotic eggs are the yolk sac, the chorion, and the amnion. The functions of these membranes are:Nutrient storage: The yolk sac stores nutrients, such as proteins and fats, which are essential for the developing embryo.Waste removal: The chorion and the allantois, which is a part of the yolk sac, help in the removal of waste products, such as nitrogenous waste, produced by the embryo.Gas exchange: The chorion facilitates exchange of oxygen and carbon dioxide between the embryo and the external environment.