Number of the records: 1
vak žĺtkový
Record number d015017 Date 06.06.2025 Type M - MESH Topical term vak žĺtkový UDC A10.615.284.981A16.254.750.981A16.331.800 Note The first of four extra-embryonic membranes to form during EMBRYOGENESIS. In REPTILES and BIRDS, it arises from endoderm and mesoderm to incorporate the EGG YOLK into the DIGESTIVE TRACT for nourishing the embryo. In placental MAMMALS, its nutritional function is vestigial; however, it is the source of INTESTINAL MUCOSA; BLOOD CELLS; and GERM CELLS. It is sometimes called the vitelline sac, which should not be confused with the VITELLINE MEMBRANE of the egg. subject heading
Number of the records: 1