How Do You Spell ALLANTOIC VESICLE?

1. The allantoic vesicle is a structure found in the early stages of embryonic development in certain animals. It originates from the endoderm layer of the embryo and is present in most reptiles, birds, and mammals. The allantoic vesicle is specifically formed from the fusion of the splanchnopleuric mesoderm and the hindgut endoderm.

   This fluid-filled sac-like structure plays a crucial role in the transport and storage of waste products, particularly nitrogenous waste such as uric acid. The allantoic vesicle acts as a temporary reservoir for these waste materials, preventing their accumulation and potential toxicity inside the developing embryo.

   Additionally, the allantoic vesicle is involved in gas exchange, where it aids in the exchange of oxygen and carbon dioxide between the developing embryo and its environment. Through the delicate walls of the vesicle, oxygen is taken up, and carbon dioxide is released into the surrounding fluid.

   In reptiles and birds, the allantoic vesicle can expand significantly, storing a considerable amount of waste and gas exchange products. However, in mammals, this structure is much smaller and less developed due to the presence of the placenta, which performs similar functions.

   The allantoic vesicle eventually fuses with the chorion, another embryonic membrane, forming the chorioallantoic membrane. This membrane allows for further gas and nutrient exchange as the embryo continues to develop.

2. The hollow portion of the allantois.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

Common Misspellings for ALLANTOIC VESICLE

The word "allantoic vesicle" is derived from the combination of two terms: "allantoic" and "vesicle".

The term "allantoic" is derived from the Latin word "allantoides", which is derived from the Greek word "allanton", meaning sausage. The term "allantois" refers to a membranous sac or diverticulum that develops from the embryonic gut in reptiles, birds, and mammals. The allantois is involved in the exchange of gases and waste products between the embryo and the maternal blood.

The term "vesicle" is derived from the Latin word "vesicula", which means a small, fluid-filled sac or cavity. In biological terms, a vesicle refers to a small, fluid-filled structure or sac within the body.