Question

What are the three sets of paired veins present in the early embryonic stage

of vertebrates?​

Answer 1

Answer:

By the fifth week of development there are three major sets of veins: the vitelline, umbilical and cardinal veins. The vitelline veins drain the gut tube, the umbilical veins bring oxygenated blood from the placenta, and the cardinal veins drain the head and body wall

Answer 2

By the fifth week of development there are three major sets of veins: the vitelline, umbilical and cardinal veins. The vitelline veins drain the gut tube, the umbilical veins bring oxygenated blood from the placenta, and the cardinal veins drain the head and body wall