0
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
Why does thrombi form in the arteries?
A thrombosis or thrombus is a blood clot. They can develop in any vein, but especially in the femoral veins of the thighs and in veins located in the calves. While many health issues can result in a clot developing, the most common reasons are a combination of these facts:
- inability or failure to move about frequently; inactivity, including jobs that require sitting for long hours
- inability or failure to stay adequately hydrated
- high cholesterol
- high blood pressure
- any circulatory condition in which the blood vessels become narrowed
A clot usually begins with RBCs becoming sticky, such as when the person is dehydrated. The sticky RBCs attach to a vein wall. As more blood swooshes by and past the sticky spot, more RBCs also begin to stick to that spot. A vein may have just a bump of sticky RBCs, or the clot can fill half or more of the vein lumen (the hollow part of the blood vessel).
IF the clot stays together, it can block off the flow of blood completely. The limb below the clot might get hot, red, painful, swollen--- or there may be no symptoms. If severe, the entire limb may swell. The clot may form a clothesline-like structure, filling a vein for many inches or even feet.
IF a portion of the clot breaks off, it becomes an embolus. It can then travel to the heart, lungs, or brain where it can cause considerable damage or even death.
Penetrating injuries to the neck can damage the jugular vein. Sometimes it also get damaged with bleeding during Central venous line, a procedure which involves cannulation of the neck veins for feeding or monitoring.
What is the job of arteries and arterioles?
The function is it carries blood away from the heart, and the structure of the wall is is usually very thick, there is 3 layers of the wall. The first is Epithelial cells, the second is muscle tissue, and the last is a flexible connective tissue.
The condition of varicose veins in the esophagus is called?
The condition of varicose veins in the esophagus is called esophageal varices. These swollen veins occur due to increased pressure in the portal vein, often as a result of liver cirrhosis or other liver diseases. Esophageal varices can lead to serious complications, including bleeding, which is a medical emergency. Proper management and monitoring are crucial for individuals with this condition.
What is pertaining to the artery?
"Pertaining to the artery" refers to anything related to arteries, which are blood vessels that carry oxygenated blood away from the heart to various parts of the body. This can include anatomical structures, functions, diseases, or medical conditions associated with arteries, such as atherosclerosis or hypertension. The term may also be used in medical contexts to describe procedures or treatments involving arteries, like angioplasty.
Why is saline water given through the vein not through the artery?
Because it is easier, safer, and less painful to puncture a vein than an artery. The vein is larger than the artery and has a thinner wall. The artery is covered in a muscular layer, while the vein is not. The angle that you would have to use to safely enter an artery would be awkward if sitting across from a patient, while the angle of entry for a vein is straight on.
What are all the veins and arteries in a dogs cardiovascular system?
A dog's cardiovascular system consists of several key arteries and veins. Major arteries include the aorta, pulmonary arteries, carotid arteries, and femoral arteries, which transport oxygenated blood from the heart to various body parts. Major veins include the superior and inferior vena cavae, pulmonary veins, and femoral veins, which return deoxygenated blood to the heart. Additionally, there are numerous smaller arteries and veins that supply and drain blood from specific organs and tissues throughout the body.
What happens when coronary artery becomes occluded?
There will be reduced blood flow to the myocardium and the duration and severity will determinate the fate of the compromised myocardium.
Some of the features are systolic and diastolic disfunction, elevation of filling pressures, electrocardiographic changes and pain.
In case of prolonged cessation of blood flow the myocardial infarction is the final outcome.
Where is the jugular vein located on the wrist?
The jugular vein is not located on the wrist; it is primarily found in the neck. There are two main jugular veins on each side of the neck: the internal and external jugular veins, which drain blood from the head and neck back to the heart. If you're looking for major veins in the wrist, you would be referring to the radial and ulnar veins.
How deep is your artery in your inside of your arm?
The major artery in the inside of your arm is the brachial artery, which typically lies about 1 to 2 centimeters deep beneath the skin in the upper arm. As it branches into the radial and ulnar arteries at the elbow, these arteries are also relatively superficial, making them accessible for procedures like blood draws or blood pressure measurements. However, the exact depth can vary based on individual anatomy and body composition.
What veins drain the areas supplied by the carotid artery?
The areas supplied by the carotid artery are primarily drained by the internal jugular vein and the external jugular vein. The internal jugular vein collects blood from the brain, face, and neck, while the external jugular vein drains the superficial structures of the head and neck. Additionally, smaller veins such as the facial vein and the thyroid veins also contribute to draining regions supplied by the carotid artery.
Incision of the vein is called "venotomy." This surgical procedure involves making an incision in a vein, typically for the purpose of accessing the venous system for blood sampling, catheter placement, or other medical interventions. Venotomy is often performed in clinical settings, such as during surgeries or for therapeutic treatments.
Can size of veins or arteries cause high blood pressure?
Yes, the size of veins or arteries can influence blood pressure. Narrowed or constricted arteries can increase resistance to blood flow, leading to higher blood pressure, a condition known as hypertension. Conversely, enlarged arteries may lead to lower resistance, but if they become too large or lose elasticity, it could also contribute to cardiovascular issues. Overall, the structure and size of blood vessels play a significant role in regulating blood pressure.
How does blood return to the heart in the femoral vein?
Blood returns to the heart through the femoral vein by a combination of factors. The contraction of leg muscles during movement helps propel blood upward against gravity, while one-way valves in the vein prevent backflow. Additionally, the pressure changes in the thoracic cavity during breathing further assist venous return. Ultimately, the femoral vein drains into the external iliac vein, which then joins the inferior vena cava to return blood to the heart.
What is the function of a vein in a long bone?
Veins in a long bone function primarily to transport deoxygenated blood away from the bone and return it to the heart. They are part of the bone's vascular system, helping to maintain proper blood circulation and nutrient exchange. Additionally, veins assist in regulating the bone's temperature and contribute to the overall metabolic processes within the bone tissue.
