Cotyledon (mammal)
Encyclopedia
In human development, the cotyledons are the approximately 15-30 separations of the desidua basalis of the placenta, separated by placental septa. Each cotyledon consists of a main stem of a chorionic villus as well as its branches and subbranches etc.

Vasculature

The cotyledons receive fetal blood from chorionic vessels
Chorionic vessels
Chorionic vessels are blood vessels, including both arteries and veins, that carry blood through the chorion in the feto-placental circulation....

, which branch off cotyledon vessels into the cotyledons, which, in turn, branch into capillaries. The cotyledons are surrounded by maternal blood, which can exchange oxygen and nutrients with the fetal blood in the capillaries.

External links

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