How Do You Spell YOLK SAC?

1. The yolk sac is a crucial anatomical structure found in the embryos of many vertebrate species, including mammals, birds, and reptiles. It is an extraembryonic membranous sac that serves as the primary source of nourishment for the developing embryo during the early stages of development.

   The yolk sac is attached to the embryo through a yolk stalk or vitelline duct, which facilitates the transfer of nutrients and waste products between the embryo and the sac. Its main function is to store and supply the growing embryo with yolk, a nutrient-rich substance composed of proteins, lipids, and other essential nutrients necessary for proper development.

   In many animal species, the yolk sac also has a respiratory role, aiding in the transport of oxygen to the embryo. It is also involved in the production and circulation of blood cells during the early stages of embryogenesis.

   The yolk sac is eventually absorbed or utilized by the developing embryo as it matures. In some species, such as mammals, the yolk sac plays a relatively minor role in embryonic development and is eventually replaced by the placenta for nutrient supply. However, in species like birds, the yolk sac remains an important structure throughout development, providing nutrients until hatching.

   Overall, the yolk sac is a vital component of embryonic development, ensuring the appropriate supply of nutrients and support for the growing embryo until it reaches a stage where it can obtain nourishment from alternate sources.

Common Misspellings for YOLK SAC

The word "yolk sac" is derived from the combination of two terms: "yolk" and "sac".

The term "yolk" originates from the Old English word "geoloc", which can be traced back to the Proto-Germanic word "gelō" or "gulō". It is related to the Dutch word "eigeel" and the German word "Eigelb". The word "yolk" refers to the yellow, nutrient-rich substance found in the center of an egg.

The term "sac" comes from the Latin word "saccus", meaning a bag or pouch. It is also related to the French word "sac" and the Spanish word "saco". In the context of biology, a sac often refers to a membranous structure or cavity that contains or encloses something.