Allantois
Allantois
Allantois (/əˈlæntəɪs/; from the Greek allantoeides, meaning "sausage-shaped") is an important part of a developing embryo's life-support system. It is a sac-like structure formed from the embryo's gut during the early stages of embryogenesis.
Etymology
The term allantois is derived from the Greek word allantoeides, which means "sausage-shaped". This is in reference to the shape of the allantois during the early stages of embryonic development.
Function
The allantois serves several important functions in the developing embryo. It acts as a conduit for waste products, which are then transported away from the embryo. The allantois also aids in gas exchange, helping to oxygenate the blood of the developing embryo. In mammals, the allantois becomes part of the umbilical cord and the bladder, playing a crucial role in the formation of these structures.
Related Terms
- Embryo: An early stage in the development of a multicellular organism. In mammals, it is the stage of development after the zygote and before the fetus.
- Umbilical cord: A tube-like structure that connects a developing fetus to the mother's placenta, providing the fetus with nutrients and oxygen.
- Bladder: A hollow organ in the body that stores urine, one of the waste products of the body.
- Embryogenesis: The process by which the embryo forms and develops. It involves rapid cell division and differentiation.
External links
- Medical encyclopedia article on Allantois
- Wikipedia's article - Allantois
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