Inferior vena cava function

Synonyms: IVC The inferior vena cava (IVC) is the largest vein of the human body. It is located at the posterior The inferior vena cava anatomy is essential due to the vein’s great drainage area, which also makes it a hot topic for anatomy exams. For that reason, this page will cover the IVC anatomy in a way that’s easy to read and understand. Key facts Definition and function The vein that collects deoxygenated blood from the abdomen, pelvis and lower limbs and carries it to the right atrium of the heart Source Common iliac veins (L5) Tributaries Inferior Phrenic, right Suprarenal, Renal, right Testicular (gonadal), Lumbar, common Iliac and Hepatic veins Mnemonic: Portal System Returns To Liver In Humans Clinical relations Inferior vena cava thrombosis Synonyms: IVC The inferior vena cava arises from the confluence of the inferior vena caval foramen of the The tributaries of the IVC correspond to the branches of the abdominal aorta. Note that some professors will want you to know at which vertebral level the IVC gets its direct tributaries, so they are as follows: • The direct tributaries are the inferior phrenic veins (T8), right suprarenal (L1), renal (L1), right testicular (gonadal) (L2), lumbar (L1-L5), common iliac (L5) and hepatic (T8). If you want an easy way to remember them just memorise the mnemonic ' Portal System Returns To Liver In Humans'. • Left gonadal and left suprarenal renal veins drain first into the left • The veins of the The inferior vena cava commu...

Deoxygenated blood means most of the oxygen has been removed by tissues, and therefore the blood is darker. This blood comes from the legs and the body’s lower torso. The inferior vena cava empties into the right atrium of the heart. The right atrium is located on the right back side of the heart. The inferior vena cava runs posterior, or behind, the abdominal cavity. This vein also runs alongside the right vertebral column of the spine. The inferior vena cava is the result of two major leg veins coming together. These leg veins are called iliac veins. The iliac veins come together at the small of the back, at the fifth lumbar vertebra. Once the iliac veins have merged, they form the inferior vena cava, which transports the deoxygenated blood to the heart. Last medically reviewed on February 21, 2020

Anatomy The kidneys are bean-shaped, with a concave central portion called the renal hilum. Each renal vein is formed by the confluence of several smaller veins which drain the different parts of the kidney and join together in the renal hilum. The other major structures in the renal hilum are the renal artery and renal pelvis (which carries urine away), both of which are located behind the renal vein. People may have two left renal veins, one of which passes in front of the aorta, while the other passes behind. This variation, called “circumaortic left renal vein” may affect up to 8.7% of the population. People may also have a single left renal vein which passes behind the aorta (rather than the usual way, in front of it). This variation, called “retroaortic left renal vein” may affect up to 2.1% of the population. Mohammed Haneefa Nizamudeen / Getty Images Function The kidneys receive a lot of blood flow, about 25% of the total output of the heart, among the highest of any organ. Blood is delivered to the kidneys by the right and left renal arteries. The kidneys rid the blood of excess or toxic substances, excreting them into the urine. The kidneys also control the amount of water and dissolved substances removed from the blood, ensuring a constant volume and composition of body fluids. Once blood has been processed by the kidneys, it is returned to the heart via the renal veins. Renal vein thrombosis is a rare condition in which clot (or “thrombus”) develops in the rena...

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Together, your superior vena cava and inferior vena cava collect deoxygenated blood from your whole body and bring it back to your heart for new oxygen. This is why the vena cava veins are the largest veins in your body. Your upper body veins send blood to your superior vena cava and your lower body veins empty blood into your inferior vena cava. Overview Vena cava veins take blood back to the heart. What is the vena cava? The superior vena cava and inferior vena cava are very large veins that bring deoxygenated blood to your heart to get oxygen. Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your Think of it like a bus line. The downtown line is like the smaller veins from your lower body (such as veins from your kidneys, liver and lower back area) that bring deoxygenated blood into your inferior vena cava. Blood from those other veins gets on the inferior vena cava bus to go to your heart. Your uptown line (upper body) veins, such as the veins in your upper back and chest, take deoxygenated blood onto your superior vena cava bus for return to your heart. Your heart is the hub or destination where all the deoxygenated blood from the uptown and downtown bus lines (veins) goes. Anatomy Where is the vena cava located? Your inferior vena cava and superior vena cava are both on your heart’s right side. Your right and left innominate (or brachiocephalic) veins merge to form your superio...

The IVC’s job is to return blood to the heart from the lower half of the body, including the feet, legs, thighs, pelvis, and abdomen. Location The IVC starts in the lower back where the right and left common iliac veins (two major leg veins) have joined together. It runs under the abdominal cavity along the right side of the spinal column and enters the right atrium of the heart from the back of the heart. • A left IVC occurs when the left renal vein joins the left IVC but then crosses in front of the • A duplicate or double IVC is when there are two IVC veins instead of one. Its prevalence rate is typically 0.2% to 0.3%. • Azygous continuation of the IVC, where blood coming from the lower body drains into a different venous system called the azygous system. This system drains the thoracic wall and upper lumbar area of blood. • A rare variation is called absent infrarenal IVC. This results in the partial or complete absence of the IVC, likely due to another variation of the veins which merge into the IVC. An IVC filter is commonly recommended when medications used to treat blood clots, such as blood thinners, aren't effective or are contraindicated. Depending on the severity and frequency of the blood clots, IVC filters can be left in permanently or removed once the risk of clots forming and traveling to the lungs has passed.

The vena cava is a large vein that collects blood from either the upper or lower half of your body. It receives blood from several smaller veins. This is blood with the oxygen removed that the vena cava transports to the right side of the heart. Blockage or injury of a vena cava can have serious consequences for your health. What Is the Vena Cava? A vena cava (plural: venae cavae) is a large vein that carries blood to the heart. You have two venae cavae: the superior vena cava and the inferior vena cava. Together, these large veins carry deoxygenated (with the oxygen removed) blood from all over the body to the right atrium of the heart. This blood moves to the right ventricle of the heart, which pumps it to the lungs through the pulmonary artery. These large veins are formed by the merging of smaller veins. After the venae cavae are formed, smaller veins connect with them along their path. The blood from all over the head, arms, and chest is collected by various veins that all contribute to the superior vena cava. Similarly, the blood from the lower limbs, pelvis, and abdominal organs all reach the inferior vena cava. When you're at rest, your heart pumps five to six liters of blood a minute. If you're exercising hard, this can go up to 35 liters a minute. The venae cavae bring this blood back. What Does the Vena Cava Do? The venae cavae are veins, so they have one job — to carry blood from all the tissues and organs of the body to the heart. The superior vena cava carrie...

The great vessels of the heart include your aorta, pulmonary trunk, pulmonary veins and vena cava (superior and inferior). They connect directly to your heart and play a vital role in your circulatory system. These blood vessels send blood between your heart and lungs (pulmonary circuit) and between your heart and body (systemic circuit). Overview What are the great vessels of the heart? The great vessels of the heart are major blood vessels that connect directly to your heart. These arteries and veins circulate blood between your The great vessels include your: • • Main • • Superior • Inferior vena cava. Your great vessels work as a system of highways to keep blood moving in the correct paths throughout your body. These vessels connect with various Your aorta and pulmonary trunk (arteries) send blood out of your heart. Your pulmonary veins, superior vena cava and inferior vena cava (veins) carry blood into your heart. Function What is the function of the great vessels of the heart? Your great vessels are a vital part of your Circuit The circuit’s job The role of your great vessels Pulmonary circuit. Sends blood between your heart and lungs. First, oxygen-poor blood travels from your heart to your lungs. There, it receives oxygen and gets rid of waste. This refreshed blood then travels back to your heart. • Main pulmonary artery: Carries oxygen-poor blood from your heart’s right ventricle into your left and right pulmonary arteries. These arteries carry the blood to your l...

Deoxygenated blood means most of the oxygen has been removed by tissues, and therefore the blood is darker. This blood comes from the legs and the body’s lower torso. The inferior vena cava empties into the right atrium of the heart. The right atrium is located on the right back side of the heart. The inferior vena cava runs posterior, or behind, the abdominal cavity. This vein also runs alongside the right vertebral column of the spine. The inferior vena cava is the result of two major leg veins coming together. These leg veins are called iliac veins. The iliac veins come together at the small of the back, at the fifth lumbar vertebra. Once the iliac veins have merged, they form the inferior vena cava, which transports the deoxygenated blood to the heart. Last medically reviewed on February 21, 2020

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