(a)   carries well-oxygenated blood from placenta to ductus venosus.

Ductus venosus connects umbilical vein to the (a)  

Deoxygenated blood from the upper part of the body enters the right atrium through (a)   .

Deoxygenated blood from lower part of the body enters the heart through (a)   .

Blood in right atrium flows into right ventricle and (a)   .

Blood from right atrium enters left atrium through (a)  

The pulmonary circulation has (a)   resistance compared to systemic circulation.

Major portion of blood from right ventricle flows into descending aorta through (a)   .

Only a minor portion of blood from right ventricle flows into the (a)   in view of high pulmonary resistance.

Pressure in the (a)   are higher than the left atrium

Blood from left ventricle enters the systemic circulation through the (a)   aorta

Deoxygenated blood from foetal body returns to placentar via (a)  

There are one umbilical vein and (a)   umbilical arteries in foetus.