The term "vitelline duct" refers to a narrow tube-like structure that connects the yolk sac of an embryo to its midgut. The word "vitelline" (pronounced /vɪtəlaɪn/ ) comes from the Latin word "vitellus" meaning yolk, while "duct" (pronounced /dʌkt/) simply means a tube or a pipe. Therefore, the spelling of "vitelline duct" refers to the tube that allows nutrients from the yolk to pass into the developing embryo's digestive system. Understanding the IPA phonetic transcription makes it easier to spell and articulate complex scientific terms like "vitelline duct."
The vitelline duct, also known as the omphalomesenteric duct or yolk stalk, is a structure that exists in the early stages of embryonic development. This duct serves as a connection between the developing embryo and the yolk sac. It is formed during the process of gastrulation, when the cells of the embryo undergo a series of complex movements and reorganization.
The vitelline duct is responsible for transporting nutrients from the yolk sac to the developing embryo. The yolk sac, which is attached to the ventral surface of the embryo, contains vital nutrients, such as proteins and lipids, that are necessary for the early stages of embryonic development. Through the vitelline duct, these nutrients are transferred from the yolk sac to the developing tissues and organs of the embryo.
As the embryo grows and develops, several changes occur within the body, one of which is the absorption of the yolk sac. Ultimately, the vitelline duct becomes obsolete and regresses, disappearing entirely as the embryonic stage progresses. However, in some rare cases, the vitelline duct may fail to close properly, resulting in a congenital abnormality known as an omphalomesenteric duct remnant or a Meckel's diverticulum.
In conclusion, the vitelline duct is a temporary structure that connects the developing embryo to the yolk sac during early embryonic development. Its role is vital in providing essential nutrients to support the growth and development of the embryo before it becomes self-sufficient.
Umbilical d.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "vitelline" comes from the Latin word "vitellus", meaning yolk. The term "duct" originates from the Latin word "ductus", which means a conduit or channel. Therefore, the etymology of "vitelline duct" can be understood as a channel related to the transportation of yolk.