0
Blood donations or blood taken for tests at a laboratory are taken from a vein.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoMost blood tests are run on venous blood due to safety concerns and ease of sample collection.
Add your answer:
Earn +20 pts
What are arterioles and venues?
== == Arterioles are very tiny arteries. In some areas of the body there are places where arteries and veins come together in tiny formations to swap oxygenated blood (in the arteries) for unoxygenated blood (in the veins). (As the veins get smaller they become capillaries, then caprioles.) The arteries are responsible for delivering blood with oxygen from the lungs to the rest of the body. Veins carry the "used blood" with no oxygen back to the heart where it passes into the lungs and picks up more oxygen and gets rid of the carbon dioxide that builds up as our bodies use the oxygen. The arterioles and caprioles come together to swap this blood. Well the above might be true but...... Arterioles are small arteries that deliver blood to the Capillaries. While Venules are small veins that are connected to the Capillaries.
Does the heart have veins?
Yes, veins carry blood back to the heart after the oxygen has been delivered to the body's various organs. Just to differentiate, arteries are what carry oxygen-rich blood from the heart to the body's organs. Hope this helps!
Does blood flow more rapidly in the capillaries or in arteries?
Remember arteries come from the heart, and veins go from the organs back to the heart. Therefore, as the heart is the main pump, the arteries have the greatest pressure, so "the blood flow is more rapid in arteries."
How does the heart contribute to the human body?
Blood return to the right atrium of the heart through the superior and inferior vena cavae. Blood then travels to the right ventricle and leaves the heart through the pulmonary veins. The pulmonary veins lead to the lungs where blood is oxygenated. Oxygenated blood returns the left atrium of the heart via the pulmonary veins. Then blood travels to the left ventricle and leaves through the aorta. === ===
Why large veins and arteries located next to each other?
Veins and arteries are located next to each other due to an evolutionary phenomena known as counter-current heat exchange. Your body tries to maintain an optimum temperature of 37oC, and since the body's core (chest area) delivers the blood to the extremeties, that blood may risk coming back cold. And if the blood happens to come back to the heart colder, that would not be achieving homeostasis. Your body is made to fight entropy. So what evolution decided is to put veins and arteries together so that heat exchange can happen through arteries and veins going to opposite directions. Arteries pump blood away from the heart and veins bring blood back to the heart, since they are going in opposite directions, they can exchange heat making the veins carry back some heat back to the heart, thus the naming "counter current heat exchange".
What are tubes that carry blood around the body?
These tubes (along with the heart) are known as the circulatory system, and they come in three varieties: arteries, veins, and capillaries. Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are smaller diameter tubes connecting arteries and veins, through which blood interacts with tissues of the body.
When you injure ourselves where does the blood come from veins or arteries?
Mostly veins or tiny artery's. If you cut an artery you will have a pulsating bleeding
What are that's Carrie the blood around the body?
These tubes (along with the heart) are known as the circulatory system, and they come in three varieties: arteries, veins, and capillaries. Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries are smaller diameter tubes connecting arteries and veins, through which blood interacts with tissues of the body.
Where does blood travel in your body?
The heart pumps blood through blood vessels. Blood vessels leaving the heart are called arteries, and the blood vessels returning to the heart are called veins. Connecting the arteries and veins are smaller blood vessels called capillaries.It's pumped around through tubes called veins and arteries by the heart.The circulatory system is basically a closed network of tubes. The heart muscles contract, which squeezes blood into the arteries. There are valves in arteries and veins to stop the blood flowing 'backwards' - and so, with each heartbeat, the blood is forced forwards through the circulatory system before returning to the heart to start again.
What are arterioles and venues?
== == Arterioles are very tiny arteries. In some areas of the body there are places where arteries and veins come together in tiny formations to swap oxygenated blood (in the arteries) for unoxygenated blood (in the veins). (As the veins get smaller they become capillaries, then caprioles.) The arteries are responsible for delivering blood with oxygen from the lungs to the rest of the body. Veins carry the "used blood" with no oxygen back to the heart where it passes into the lungs and picks up more oxygen and gets rid of the carbon dioxide that builds up as our bodies use the oxygen. The arterioles and caprioles come together to swap this blood. Well the above might be true but...... Arterioles are small arteries that deliver blood to the Capillaries. While Venules are small veins that are connected to the Capillaries.
Does the heart have veins?
Yes, veins carry blood back to the heart after the oxygen has been delivered to the body's various organs. Just to differentiate, arteries are what carry oxygen-rich blood from the heart to the body's organs. Hope this helps!
When you cut yourself, where does the blood come from?
Depends, how deep. On the skin surface you are looking at capillaries and small veins. Past the skin, you are looking at bigger veins and arteries.
Why are there no blood vessels in the heart?
There are blood vessels in the heart. They are the coronary arteries and veins. The cornary arteries are so important that they come off the aorta before any oxygen rich blood goes to any other part of the body.
Why is the blood in arteries richer in oxygen than the blood in veins?
Because blood in your arteries are fresh from your lungs. The haemoglobin in your red blood cells have just "picked up" oxygen, they then travel to cells in your body where that oxygen is used for the cells to respire aerobically.. (a lot happens to the red blood cell, which you can read a lot more about!) Therefore by the time the red blood cell reaches the veins, most of the oxygen has been used. Hope that helps :)
Does blood flow more rapidly in the capillaries or in arteries?
Remember arteries come from the heart, and veins go from the organs back to the heart. Therefore, as the heart is the main pump, the arteries have the greatest pressure, so "the blood flow is more rapid in arteries."
How does the heart contribute to the human body?
Blood return to the right atrium of the heart through the superior and inferior vena cavae. Blood then travels to the right ventricle and leaves the heart through the pulmonary veins. The pulmonary veins lead to the lungs where blood is oxygenated. Oxygenated blood returns the left atrium of the heart via the pulmonary veins. Then blood travels to the left ventricle and leaves through the aorta. === ===
Why large veins and arteries located next to each other?
Veins and arteries are located next to each other due to an evolutionary phenomena known as counter-current heat exchange. Your body tries to maintain an optimum temperature of 37oC, and since the body's core (chest area) delivers the blood to the extremeties, that blood may risk coming back cold. And if the blood happens to come back to the heart colder, that would not be achieving homeostasis. Your body is made to fight entropy. So what evolution decided is to put veins and arteries together so that heat exchange can happen through arteries and veins going to opposite directions. Arteries pump blood away from the heart and veins bring blood back to the heart, since they are going in opposite directions, they can exchange heat making the veins carry back some heat back to the heart, thus the naming "counter current heat exchange".
