It carries deoxygenated blood from the upper half of the body to the heart 's right atrium.
Q1 - C Vena Cavae brings back deoxygenated blood back from the body to the heart. Superior vena cava brings blood from head, neck and forearms (upper body) to the heart and the inferior vena cava brings back blood from the liver, kidneys and jind limbs etc (lower body) back to the heart. Q3 - C Pituitary gland plays an important role as a 'controller' .  The inferior vena cava (or IVC) (Latin: vena, vein, cavus, hollow), is one of the venae cavae, two large veins, that carries deoxygenated blood from the body into the right atrium of the heart. The inferior vena cava carries blood from the lower half of the body whilst the superior vena cava carries blood from the upper half of the body. It is formed by the joining of the right and the left common iliac veins, usually at the level of the fifth lumbar vertebra From Wikipedia, the free encyclopedia. The superior vena cava (also known as the cava or cva) is a large diameter (24 mm), yet short, vein that carries deoxygenated blood from the upper half of the body to the heart 's right atrium. It is located in the anterior right superior mediastinum.  The superior vena cava is one of the two main veins bringing de-oxygenated blood from the body to the heart. Veins from the head and upper body feed into the superior vena cava, which empties into the right atrium of the heart. The right atrium receives de-oxygenated blood from the body through the superior vena cava (head and upper body) and inferior vena cava (legs and lower torso). The sinoatrial node sends an impulse that causes the cardiac muscle tissue of the atrium to contract in a coordinated, wave-like manner. Vena cava: The superior vena cava is the large vein which returns blood to the heart from the head, neck and both upper limbs. The inferior vena cava returns blood to the heart from the lower part of the body. The return of blood via the vena cava can be compromised and cause disease.  Superior vena cava syndrome (SVCS) occurs when a person’s superior vena cava is partially blocked or compressed. The superior vena cava is a major vein in a person’s body. It carries blood from the head, neck, upper chest, and arms to the heart. Cancer is usually the main cause of SVCS. Relieving side effects, called symptom management or palliative care, is an important part of cancer care and treatment The superior vena cava is located in the upper thoracic region. It is the main vein that drains into the right atrium of the heart. Blood returning from the brain, upper thora … cic region, and arms travels through this vein to the heart. Two major veins bring deoxygenated blood from the body to the  heart: the superior vena cava and the inferior vena cava. The  Superior vena cava brings blood from the upper … half of the body to  The inferior vena cava is one of two veins which carries deoxygenated blood from the body into the right atrium of the heart, the other vein is the superior vena cava: inferior deals with blood coming from body areas below the heart, superior deals with blood coming from above the heart. The inferior vena cava is the large vein that carries de-oxygenated blood from the lower half of the body into the right atrium of Vena Cava-Function and definition. Vena Cava are the two largest veins in human body together called the venae. These veins collectively return deoxygenated BLOOD to the HEART. Both of them deplete all the blood into the right atrium. The superior vena cava, large but short vein, brings blood from the upper part of the organism, the head and upper limbs, and empties into the top of the right atrium.
https://answers.yahoo.com/question/index?qid=20080919232722AANbyit https://en.wikipedia.org/wiki/Inferior_vena_cava https://en.wikipedia.org/wiki/Superior_vena_cava http://www.cardioconsult.com/Anatomy/ http://www.medicinenet.com/script/main/art.asp?articlekey=5974 http://www.cancer.net/navigating-cancer-care/side-effects/superior-vena-cava-syndrome http://www.answers.com/Q/What_is_the_function_of_the_superior_vena_cava http://www.answers.com/Q/The_function_of_vena_cava http://beltina.org/health-dictionary/vena-cava-definition-function.html
what is the main function of the superior vena cava