Cotyledon

The cotyledon is the structural and functional unit of the formed placenta in mammals, including humans. Each cotyledon is a cup-shaped space divided by decidual sects. It provides a connection between the maternal and fetal circulatory systems, and also serves as a source of nutrition for the developing embryo.

The structure of the cotyledon consists of a main branch, which consists of the umbilical blood vessels of the fetus. This branch branches further into many chorionic villi that form the surface of the cotyledon. The blood of the mother and fetus do not mix, but ensure the exchange of substances between organisms.

Cotyledons play an important role in the development of the embryo and fetus. They are the main source of nutrition for the embryo at the beginning of its development, and then for the fetus during pregnancy. In addition, cotyledons are involved in the production of hormones that regulate the growth and development of the fetus.

In different animal species, cotyledons have different structures and functions. For example, in ruminants, cotyledons have many complex folds, which increases their surface area and ensures efficient exchange of substances between maternal and fetal blood.

In conclusion, the cotyledon is an important structural and functional unit of the placenta, which provides communication between the maternal and fetal circulatory systems, and also serves as a source of nutrition and regulator of the growth and development of the embryo and fetus.

The cotyledon is the structural and functional unit of the formed placenta. These are cup-shaped spaces separated by decidual sects. Each of them contains a main branch consisting of the umbilical vessels of the fetus. These vessels branch into many small villi.

The main branch consists of the umbilical artery and umbilical vein. It ensures metabolism between the fetus and mother.

The chorionic villi form the surface of the cotyledons. They provide contact between the fetus and mother and promote metabolism between them.

The plant has fruits.

Cotyledons Cotyledons, or fruiting bodies (from Greek κωθίλη "cup" + Latin dens "seed") is a term used by botanists to designate the structure typical of the flower inflorescence and the central part of the reproductive organs of higher spore plants, angiosperms and gymnosperms. Cotyleda or cotyleda cavity is an area filled with seeds and enclosed between the axial organ of the inflorescence and one or more bracts. Different classes and divisions of animals have different fruits. The presence of fruits in an animal contradicts the general biogenetic concept, according to which fruits appeared in the process of evolution secondarily as a specialized reproductive organ.