Anal fossa (Prvctodewn)

The anal fossa, also known as Prvctodewn, is an invagination of ectoderm that forms at the caudal end of the embryo. This depression is located immediately in front of the anus and is delimited from the hindgut of the embryo by the anal membrane.

During embryo development, three germ layers are formed: endoderm, mesoderm and ectoderm. The ectoderm includes the skin, nervous system and other tissues. At the end of the fifth week of pregnancy, the ectoderm begins to invaginate at the caudal end of the embryo, forming the Anal Fossa.

It is important to note that the anal membrane, which separates the Fossa Anal from the hindgut of the embryo, ruptures around the third month of pregnancy. This allows fluid and waste to pass through the anus after birth.

The fossa anal bears some similarities to another invagination of ectoderm called the Stomodeum. The stomodeum forms at the anterior end of the embryo and separates the oral cavity from the gastrointestinal tract. Both of these invaginations play an important role in the formation of the digestive system of the embryo.

In conclusion, the Anal Fossa (Prvctodewn) is an important aspect of the development of the embryonic digestive system. Its formation and rupture of the anal membrane are important stages in the development of the embryo, which allow the normal functioning of its digestive system after birth.

The fossa anal, also known as Prvctodewen, is an invagination formed on the tail of the embryo and is known as an ectodermal organ. This strange and incomprehensible organ was discovered not so long ago and its exact origin and role in the human body have not yet been studied. However, there are several facts that are known about this pit.

The first sign of the presence of Prvctodowen is that a convex sac appears on the mound. As for the function, many researchers believe that this organ is needed for something, but no one can specifically say for what purpose it is needed. Doctors note that the fossa has a relatively thin membrane that separates it from the tail gut. In the fifth or sixth month of development, the embryo reaches approximately two centimeters in length. At this time, membrane rupture is observed, which means that Prvctdowen disappears after a certain time.