Most veins in the body have a corresponding artery, but there are some exceptions. The umbilical vein, which is the vein that carries oxygenated blood from the placenta to the fetus during pregnancy, is not matched by an artery.
Instead, two umbilical arteries carry deoxygenated blood from the fetus to the placenta. Similarly, the pulmonary vein, which carries oxygenated blood from the lungs to the heart, is not matched by an artery.
Instead, four small pulmonary arteries carry deoxygenated blood away from the heart to the lungs. Finally, all of the veins in the brain and spinal cord do not have a corresponding artery; these veins have return blood from a capillary bed called a sinusoid.
Which vein has no artery by the same name?
The great saphenous vein is the only vein in the body that has no corresponding artery by the same name. The great saphenous vein is the longest vein in the body and is found in the lower limbs, running up the inner side of the leg, alongside the femoral artery, before surface veins connect it to the femoral vein near the groin.
From the femoral vein, the great saphenous vein continues upwards, piercing through fascia at the saphenous opening and emptying into the femoral vein at the junction of the inguinal ligament and saphenous opening.
This vein has no corresponding artery because it does not arise from an artery.
What does a vein have that an artery doesn’t have?
Veins have one major feature that differs them from arteries: valves. Veins contain valves which act as one-way check valves, preventing blood from flowing backwards in the vein. This is important, because veins do not have the same muscular walls as arteries have, meaning that veins rely on the valves and surrounding muscles to propel blood back to the heart as opposed to arteries, which actively push the blood through their strong muscular walls to the organs.
Valves in veins also prevent pooling of the blood due to gravity. This is important to maintain an adequate blood supply to the various organs of the body, as pooling of blood may lead to venous damage and edema.
What is another name for the coronary vein?
The coronary vein is also referred to as the cardiac vein or the great cardiac vein. The coronary vein is a large vein located within the heart’s muscle tissue. It collects deoxygenated blood from the myocardium, the heart’s muscular layer, and returns it to the right atrium.
Generally, the coronary veins are smaller than the coronary arteries, and have a thinner wall.
What are the names of the major vein and artery?
The major veins of the body are the superior vena cava (SVC), inferior vena cava (IVC), and the azygos vein. The SVC is the largest vein in the human body and can be found in the thoracic region, carrying deoxygenated blood from the head, neck and arms to the heart.
The IVC collects blood from the lower limbs and lower body and transports it to the heart. The azygos vein is a single vein located in the chest which carries deoxygenated blood from the lower body to the superior vena cava.
The major arteries of the body are the aorta, the pulmonary artery, the right subclavian artery, the left subclavian artery, the right common carotid artery, the left common carotid artery, the right external iliac artery, the left external iliac artery, the right internal iliac artery and the left internal iliac artery.
The aorta is the main artery in the body and carries oxygenated blood from the heart to the rest of the body. The pulmonary artery carries deoxygenated blood to the lungs. The right subclavian artery and the left subclavian artery provide oxygenated blood to the arms, whereas the right common carotid artery and the left common carotid artery supply oxygenated blood to the head and neck.
The right external iliac artery and the left external iliac artery supply oxygenated blood to the lower limbs, while the right internal iliac artery and the left internal iliac artery provide oxygenated blood to the pelvic region.
Do arteries have names?
Yes, arteries do have names. Generally, the names of arteries contain prefixes or suffixes that indicate their size and location. Most of the larger arteries have names that include the name of the area they belong to, such as the carotid arteries in the neck, the axillary artery in the arm, and the femoral artery in the leg.
Smaller branches of larger arteries may also have distinct names, such as the radial artery in the arm or the popliteal artery in the leg.
What are veins also called?
Veins are often referred to as vascular channels or blood vessels, as they are responsible for transporting blood throughout the body. They are part of the circulatory system, which also includes arteries and capillaries.
Veins have thin walls and carry de-oxygenated blood from the body parts to the heart and lungs. They are usually less muscular than arteries, but have a series of valves that keep the blood moving in the right direction.
They are also sometimes called superficial veins, as they lie near the surface of the skin.
Do veins have different names?
Yes, veins have different names. The names of veins depend largely on their locations in the human body. Veins located in the arms, hands, and legs are generally called peripheral veins, while veins located in the chest and abdomen are called central veins.
Superficial veins are those typically close to the skin’s surface, while deep veins are those located quiiter and closer to the muscles. The major veins in the body include the superior vena cava, the inferior vena cava, the sxyternal jugular vein, the cephalic vein, the axillary vein, the renal vein, and the brachial vein.
Does every blood vessel have a name?
No, not every blood vessel in the body has a name. Most larger ones do, including the aorta, vena cava, pulmonary artery, and pulmonary vein. However, there are many smaller vessels in the body that do not have designated names.
Additionally, blood vessels that received different anatomical names depending on the region of the body in which they occur may also not have a standardized name.
What are the 4 types of veins?
There are four main types of veins found in the human body:
1. Superficial veins: These are thin, close to the surface veins that allow blood to move closer to the skin. Superficial veins are mainly found in the arms, legs, hands, and feet.
2. Deep veins: Deep veins are generally found beneath muscles and are responsible for making up the venous system. These veins help to move oxygen-rich blood back up towards the heart.
3. Pulmonary veins: These veins are only found in the lungs and are responsible for transferring oxygen-rich blood from the lungs to the left atrium of the heart.
4. Venules: These are small veins that transfer blood from the capillaries to larger veins. Venules allow for the movement of blood from the body’s organs and tissues back to the heart.
Which veins and arteries are exceptions?
The two main veins and arteries that are exceptions are the pulmonary artery and the pulmonary vein. The pulmonary artery carries deoxygenated blood away from the heart to the lungs, while the pulmonary vein carries oxygenated blood from the lungs back to the heart.
These two exceptions are the only veins and arteries that don’t fit the usual pattern of carrying oxygenated or deoxygenated blood away from or toward the heart.
Do veins have any exceptions?
Yes, veins do have exceptions. Veins are part of the circulatory system, which carries blood from the heart and back again. Generally, veins carry oxygen-depleted blood away from organs and tissues back to the heart.
However, there are several exceptions to this rule. For example, the pulmonary veins have the unique function of carrying oxygenated blood from the lungs back to the heart. In addition, some veins in the brain, face, and scalp may carry oxygenated blood due to the presence of an extensive arterio-venous anastomosis.
Lastly, a small number of veins may become engorged with oxygenated blood during periods of increased exertion or excitement.
What is the exception in function of artery and vein?
An exception to the general function of arteries and veins is that arteries carry oxygenated blood while veins carry deoxygenated blood. The exception to this rule is found in the pulmonary artery and vein, where the pulmonary artery carries deoxygenated blood from the heart to the lungs and the pulmonary vein carries oxygenated blood from the lungs back to the heart.
Another exception occurs in the umbilical arteries and veins in fetuses, where the umbilical artery carries deoxygenated blood from the fetus to the placenta and the umbilical vein carries oxygenated blood from the placenta to the fetus.
Is pulmonary vein an exception?
No, pulmonary vein is not an exception. The pulmonary vein is a large vein that carries deoxygenated (used) blood from the lungs to the left atrium of the heart. It is not an exception to the other veins, which also carry blood back to the heart.
The pulmonary vein’s unique role is that it specifically brings deoxygenated blood from the lungs to the heart while other veins circulate the blood throughout the body. Additionally, the pulmonary vein is a part of the systemic circulation, which transports blood to and from the heart; while the other veins are part of the pulmonary circulation, which transports blood to and from the lungs.
What artery or arteries though are an exception to this rule and carry deoxygenated blood away from the heart?
The Pulmonary Artery and the Aorta are the two exceptions to the general rule, or homogrophy, that arteries carry oxygenated blood away from the heart. The Pulmonary Artery carries deoxygenated blood from the right ventricle of the heart to the lungs, where oxygen can be picked up.
The Aorta carries oxygen-poor blood from the left ventricle of the heart to the rest of the body. This blood still carries some oxygen, however, as the left ventricle of the heart pumps this oxygen-poor blood through the aortic valve to the rest of the body where oxygen, nutrients, and hormones are distributed.