6. ALBUMEN: The egg white is known as the albumen, which comes from albus, the Latin word for “white.” Four alternating layers of thick and thin albumen contain approximately 40 different proteins, the main components of the egg white in addition to water. Eggs can provide valuable nutrients as part of a balanced diet. 5. Vitelline membrane -- The clear casing that encloses the egg yolk. The primary function of the female reproductive system is to produce the female egg cells which are essential for reproduction. It protects and provides a complete diet for the developing embryo, and serves as the principal source of food for the first few days of the chick's life. This part of the egg is a excellent source of riboflavin and protein. Fertilization of an egg by a sperm normally occurs in the fallopian tubes. (There are about 7,000 pores in a chicken eggshell.) The shell is porous and the large end contains more pores than the small end of the egg. Their job is to prevent the liquid that is inside the egg from evaporating, as well as keep the egg protected from bacteria. egg passes is also responsible for the expulsion of feces and urine. The chalazae function to suspend the egg yolk in the center of the egg. Ovulation - The releasing of the egg yolk from the ovary to begin its journey through the oviduct. The membranes are clear and soft but have a definite egg-like shape. They prevent the yolk from rising and touching the shell. Vent - the exterior opening through which passage occurs from the digestive system, the urinary tract and the reproductive tract. Fallopian tubes: These are narrow tubes that are attached to the upper part of the uterus and serve as pathways for the ova (egg cells) to travel from the ovaries to the uterus. Learn more about the health benefits of eggs, some ideas for preparing them, possible health risks, and vegan alternatives. In the long axis of the egg, the chalaziferous layer is twisted at both sides of the yolk, forming a thick rope-like structure named the chalazae (chalaza is the singular term). The air cell grows larger as an egg ages. In high-quality eggs, the inner thick albumen stands higher and spreads less than thin white. The fertilized egg then moves to the uterus, where it implants to the uterine lining. In low-quality eggs, it appears thin white. The female reproductive system is designed to carry out several functions. It is important to know that, the entire system is designed for transporting the ova to the exact fertilization site. It produces the female egg cells necessary for reproduction, called the ova or oocytes. The Parts of the Egg Looking at the egg from the outside we see the shell, which is a hard, protective covering composed primarily of calcium carbonate. 7. These are called as the ova or oocytes. The egg is also one of the most nutritious and versatile of human foods. 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