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Veins
Veins are thin blood vessels that carry blood from various body parts to the heart. These have valves in them to prevent back flow of blood.
2,123 Questions
Is there a finger that has a vein that leads directly to the brain?
The venous system is a highly-branched network of veins all over the body and brain that returns blood back to the heart for 'nutrient re-fill' after this blood has been stripped of its nutrients by body tissues. Anatomically speaking, you can trace any vein in the human body to any other vein in the human body (including a vein from your finger to your brain). However, blood does not run directly en route from any vein in any finger to the brian. Blood in the veins of your fingers (which are called your digital veins), runs from your digital veins and branches to your Ulnar and Radial veins of your arms (mainly), these two veins then branch to form your axillary vein (near your armpit). The next and last stop for blood is the superior vena cava, a large vein that dumps all of the blood that is returning from the top half of the body into the right atrium of the heart for nutrient refill.
Long story short: Anatomically..yes there is. Does blood go from your fingers to your brain? No.
I hope this provides you with your answer as well as some helpful information
Does medial cubital vein contain valves?
I would think it would have to otherwise you wouldn't be able to get venous return to the subclavian.
Has the vein burst in your wrist?
The nerves that serve the body aren't particularly strong, and they can be injured or broken from too much stretching, pressure, or cutting. If the nerve is damaged through excessive stretching or pressure, it may stop working and no longer carry messages to and from the brain. The tissue surrounding the nerve, however, may be undamaged. If the nerve is cut, the nerve along with its covering may both be broken. In any injury, the nerve's ability to carry messages may be interrupted, and this can stop muscles from working or can cause loss of feeling in the part of the body served by that particular nerve.
If a nerve fiber breaks, the end of the nerve that's farthest from the brain dies. If the insulation isn't damaged, it becomes an empty tube once the nerve completely dies. The end of the fiber closest to the brain will not die, however. In fact, it may even start healing on its own, possibly growing back through the uninjured tube until it reaches a muscle or a sensory receptor.
If both the nerve and its surrounding tissue are cut and the nerve is not repaired, a condition known as a neuroma may result. In such cases, the nerve fibers try to grow back but because they don't have a good insulating tube in which to grow, they end up forming a ball at the site of the original cut. The neuroma that results can be painful and can even cause an electrical sensation when it's touched.
Does the popliteal vein circle in front of the knee?
No - it runs up the back of the knee and provides blood to the thigh and calf.
Does it hurt if you have a varicose vein?
I started to get varicose veins at around the age of 10 years, like some other people on my fathers side of my family (including my father).
They began to hurt about 19 years later - I felt no sensation at all associated with them until I was 29, although I could see that they were becoming steadily larger and more pronounced.
At 30 I was told I had developed "phlebitis" (manifested as red lump and soreness in one place on the inside back of my calf, where there were some varicose parts of the veins) and given an operation to remove the veins "saphenous avulsion".
This operation made my leg look better, although not all the varicose veins were gone. The soreness stopped completely. The pain stopped completely.
After this operation, I felt no sensation associated with my veins again for about 10 more years - although, as always, I could see the residual varicose veins steadily becoming larger, and new ones appearing. Then they started to hurt again at around age 40. Now I am 47 and the amount of pain I am getting from the veins, while not great, is gradually increasing (and the veins are continuing to become larger, and new varicose areas developing).
So, in summary, I am now 47, have had visible varicose veins for 38 years, have had one operation for them. During the years that I have had visible varicose veins, they have hurt in total for about 8 years and not hurt at all for about 30 years.
According to Duke Heath clinic they only get worse
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Do veins never carry oxygen-rich blood?
The term "vein" describes vessels leading to the heart. The Pulmonary Veins are the only veins that carry oxygen rich blood. They carry the blood from the lungs to the heart.
How many veins are there in a dog?
There are enough blood vessels in the human body that if you placed them end to end, they would go around the equator 4X. Since half are veins and half are arteries, then veins only go around 2X. You would need to know the size of the dog. The size of a man (average) is 6 feet tall and 190 pounds.
What is the rate of deep-vein thrombosis complication after cesarean section?
The risk for developing a deep-vein thrombosis is three to five times higher in patients undergoing c-section than vaginal delivery.
What is the Function of Superior Vena Cava?
The superior vena cava brings de-oxygenated blood from parts of the body higher than the heart and returns the blood to the right atrium.
Difference between veins and lymphatic vessels?
Comparison between Lymph Vessels and Veins.
- Similarities.
- both have an interconnecting network of progressively larger vessels;
- both transport fluids to the heart;
- the larger lymph vessels have the same structure as veins, i.e. their walls have the same three layers;
- both have semi-lunar valves to prevent any backward flow of blood;
- the flow of fluid is slow but steady and at low pressure;
- the fluid is deoxygenated;
- like blood capillaries, the walls of lymph capillaries are composed of a single thin layer of squamous endothelium.
- Differences.
- the walls of lymph vessels are musch thinner and more transparent;
- the muscle layer in lymph vessel is much less developed, but there is more connective tissue;
- blood capillaries form a continuous, open circuit, whereas lymph capillaries end blindly in the tissues;
- lymph capillaries have a larger diameter than blood capillaries;
- lymph capillaries have walls which are more permeable than the walls of blood capillaries. Consequently, larger molecules (such as proteins) are able to diffuse through them.
Why do your veins come out on top of foot?
Because the veins in your foot are not as deep as other veins in your body are.
blood can still return via the deep veins
What is the function of valves in veins?
They ensure that the blood flows only in one direction (back toward the heart).
How many umbilical veins does the pig have?
During embryologic development, there are two umbilical veins, left and right, that drain blood from the placenta to the heart. The right umbilical vein regresses and under normal circumstances is completely obliterated during the second month of development. The left umbilical vein persists and delivers blood from the placenta to the developing fetus. The diameter of the intra-abdominal umbilical vein increases linearly, from 3 mm at 15 weeks of gestation to 8 mm at term.
What is the cause of blood clotting immediately after drawing blood?
Blood clotting, or coagulation, is the body's natural reaction. If it didn't clot, you could possibly keep on bleeding until you bled to death. This helps to prevent that from happening. In humans, coagulation usually involves a cellular platelet and a protein factor . The platelets forms a sort of "plug" over the opening, like the prick of the needle from drawing blood. The protein factors then reinforce this "plug" of sorts to help keep it solid until the opening heals, scabs over, closes, ect.
What is the difference between large veins and medium sized veins?
large veins have narrow tunica intima.and tunica media consist of many layers of smooth muscle which are separated by collagenous connective tissue,and have very few elastic fibers.tunica adventitia is broad,and formed by collagen,tunica adventitia have vasa vasorum.example is femoral and renal vein. in medium size veins tunica intima is a bit more then endothelial call.and have fibrous supporting layer.tunica media is composed of 2 to 4 layers of smooth muscle fibers.tunica adventitia is thick layer and made up of collagen fibers. ........................... maniba ,hebei united medical university tangshen ,,hebei .,,,china
How does the AV300 Vein Finder work?
The AV300 emits an infrared light that detects hemoglobin (a red blood cell that carries oxygen throughout the body). Hemoglobin concentration is much higher in the veins than in the rest of the tissue so the higher concentrations of it show up as a shadow. The oxygen reacts with the light, which is why you see where your veins are.
What is a life-threatening complication of deep vein thrombosis?
Deep vein thrombosis (DVT) is when you get blood clots in the deep veins of your legs (typically the femoral veins). Symptoms of DVT include leg swelling (esp asymmetric or unilateral swelling) and leg pain. The #1 life threatening complication of DVT is pulmonary embolism (PE). PE occurs when a piece of clot from the DVT breaks off and gets returned to your heart with the rest of the venous blood. The clot gets shot into your lungs via the pulmonary artery, where it will eventually get stuck. For a smallish or medium size clot, the classic symptoms are pleuritic chest pain (chest pain that gets worse with a deep breath... it kind of feels like a stitch you get from running too much), sudden-onset shortness of breath, cough (esp coughing up blood or hemoptysis), and rapid shallow breathing (tachypnea). These are the symptoms the textbooks give you, but PE is notoriously hard to diagnose because the symptoms are variable and not specific. For a massive PE, often the patient will die of right-sided heart failure before even reaching the hospital.
Because this shape works for the body. Somewhere in the evolution time line the creature which had the first cylindrical blood vessel survived and that information has been stored in the DNA and has past it on to its offspring.
The reason I believe it works is that it is the easiest shape to dilate or constrict.
Viens do not have a pulse, but they do have valves that arteries do not. Most veins carry oxygenated blood toward the heart. The only exception is the pulmonary veins that carry oxygenated blood to the left atrium of the heart. The same is true for arteries. They carry oxygenated blood from the lungs to the rest of the body except the lungs. The pulmonary arteries are the only exception because they carry deoxygenated blood to the lungs.
