Which of the following blood vessels is also known as precaval?
Inferior vena cava
Superior vena cava
None of these
The correct option is B Superior vena cava The superior vena cava collects/precaval deoxygenated blood from the upper parts of the body (head and arms) and enters into the right atrium through the Haversian valve. The inferior vena cava/postcaval collects deoxygenated blood from the lower parts of the body and enters into the right atrium through the Eustachian valve. The coronary sinuses collect deoxygenated blood from the heart walls and enter the right atrium through the Thebesian valve.