Blood Vessels

Blood vessels are the part of the circulatory system that carries the blood throughout the body. The types of blood vessels are arteries, arterioles, capillaries, venules, and veins.

5,903 Questions
Blood Vessels

What blood vessels contain valves and why?

Only veins contain valves. The valves prevent the backward flow of blood.

Blood Vessels

What blood vessel removes blood from the kidney?

renal vein

Blood Vessels

Can dogs pop a blood vessel in eye?

Yes, just as you and I.

Blood Vessels

Can you pop a blood vessel in your eye by sneezing?

Hello :)

Yes, you can cough, sneeze, bend over, or rub it and they can pop. It will get better and no need to see a doctor its just looks worse than it is. There is no way of healing the popped blood vessel as far as im aware of.

Blood Transfusions
Blood Vessels

How many liters of blood is in the human body?


Conditions and Diseases
Blood Vessels

How many pints of blood in the human body?

The average adult has eight to ten pints of blood in their body.

Blood Vessels

What blood vessel recieves blood from the head arms and neck?

Brachiocephalic veins, which collect to superior vena cava

Veterinary Medicine
Blood Vessels

Why would a Labrador have 2 lipemic hemolyzed blood samples in a row?

The most common causes would be for lipemia due to a high fat diet or obesity or having eaten recently, poor collection technique (possibly caused by a dog that fights having blood drawn) or poor handling during testing.

Ford Bronco II
Bone Pain and Fractures
Blood Vessels

How can you tell if your finger is broken or jammed?

It can be difficult to tell. A broken finger is usually very painful and its difficult or completely unable to move. The only certain way of telling is by having a Xray. but You can check for the following signs to see if it's a fracture or dislocation:









Blood Vessels

Which systemic blood vessel would you expect to have high glucose content immediately after eating?

The blood vessel you would expect a high glucose content in after eating is the portal system.

Blood Vessels

Why are the three types of blood vessels are important?

They help you stay alive, without them you would be in a graveyard!

Blood Vessels

What type of tissue has closely spaced cells and no blood vessels?


Blood Vessels

How many pints of blood are in the human body?


Human Anatomy and Physiology
Blood Vessels

How many veins are in a human body?

There are 120,000 veins in your body.

Blood Vessels

Why doesn't blood clot in the blood vessels?

First it should be clear that blood can't clot only in the presence of a anticoagulant or/and in the absence of clotting factors. if anticoagulant is not there in the vicinity of blood then blood will surely clot. Now it is clear that there is some anticoagulant in the blood vessels and that natural anticoagulant is named as heparin
blood vessel coated with galyx

Blood Vessels

What is the function of a blood vessel in a tooth?

it lets blood bring food for the nerves and gives the tooth calcium

Blood Vessels

Which blood vessel has thinner walls?

The tinycapillary has the thinnest wall, which allows the exchange of materials (oxygen, nutrients, and waste)across the wall. That's why the capillary is sometimes called an exchange vessel. Capillary walls have little fibrous tissue and are relatively muscular.Veins have thinner walls than arteries, and sometimes have valves. The walls are mostly fibrous and not muscular. Veins carry blood back to the heart.

Blood Vessels

What would cause the blood vessels around and in the eye to break?

I just recently had the same problem, and this can be caused by extremely high blood pressure (especially when BP is elevated rapidly). For instance, it could be anything from crying too hard, forceful vomiting or dry heaving.

In more frequent cases, medical issues such as hypertension or diabetes can cause the blood vessels in the eyes to break. Diabetic retinopathy is one of the more serious conditions and if this is even a possibility you should see a doctor.

I had this problem as well. It could also be something as simple as a hard sneeze or cough that caused the blood vessel to break. In this case, it most likely will not cause any injury to your eye and should clear up within 10-14 days.

Blood Vessels

What is the force exerted by blood on the inside walls of a blood vessel called?

Systolic pressure

Blood Vessels

What is the large thick walled blood vessels?


Human Anatomy and Physiology
Blood Vessels

Why valves are present in the veins?

To avoid backward flow of the blood

Blood Vessels

Does the cardiovascular system consist of the heart blood vessels and lymph?

The heart, lungs, blood vessels make up the cardio vascular system.

Blood Vessels

What kind of Involuntary muscle is found in the walls of blood vessels and in the digestive tract?

Smooth muscle tissue is the type of muscle tissue found in the walls of many organs and blood vessels in the body.

Blood Vessels

Why do blood vessels look blue under the skin?

Veins looking BlueIt is an optical illusion caused by light reflecting on and through the skin.

Blood in the arteries is bright red, blood in the veins is dark red mostly from the impurities that are being carried back to the kidneys and liver for disposal that are mixed in and brownish which darkens the red color to more maroon. Blood in veins can look "blue" when viewed through the skin because of light refraction and other factors. But the blood is red and the veins are actually white.

When a person donates blood, it comes from a vein, not an artery. It is also not exposed to air, or it would be contaminated and need to be disposed of. It also happens to be dark red, NOT blue.

The common misconception of "blue" blood is continued due to textbook illustrators use of blue and red to differentiate arteries and veins. Venous blood is actually a burgundy or maroon color.

An Optical Illusion

The reason we see blue is more into the optics side of science. It is really because of how light reflects on our skin, and the way different wavelengths piece through our skin with different effectiveness.

The veins you see through your skin appear blue because red light goes through the skin much more easily (and thus more) than blue light. The red light is absorbed, and the blue is reflected. Optical scientists also believe that the eyes see more of the blue color than the red.

A vein is just a tube blood travels through when returning to the heart and lungs after depleted of nutrients and oxygen, the neutral color of a vein itself doesn't change the color of the blood.

It is not the blood but the veins that "look" blue, and even then it is not the actual color of the vessel. The difference is in the way colored light moves through the tissues, and how the eye perceives those colors of light.

The oxidation state of the iron in the hemoglobin also affects the color but only slightly and not as much as the wastes carried in the veins do.

Some factor of the changes in blood coloration do relate to the respiratory pigment, hemoglobin. Hemoglobin is a topologically complex molecule that very readily binds to oxygen. Once the molecule is fully saturated, it reflects in the crimson red spectrum, and therefore fully oxygenated blood appears to be bright red. After the hemoglobin molecule gives up its oxygen to tissue that needs it, the molecule becomes much less reflective, and with the added wastes the venous blood carries, the returning blood appears very dark red to purple. However, it is more the addition of wastes that impacts the darkened color, not so much the change in oxygen content.

As mentioned above, blue is often used in illustrations in charts and diagrams of the circulatory system and vessels to contrast against red, with usually red representing the arterial system bearing O2 and blue being the "deoxygenated" blood in the venous system. However, this tradition of using these colors is just that: tradition. It is not based on actual blood color. The colors could just as easily be shown as yellow or green for the purposes of the illustrations to show blood flow.

The reason why only veins appear blue to your eye is because they are the most superficial to the skin and therefore seen through the skin. Arteries can not be seen because of how deep they are in the body (a protective mechanism of our bodies). The color blue/violet is the highest frequency of the visible light scale; it therefore has the most penetrating power to be seen through skin, fat, etc. Red is low frequency and is filtered out by skin and fat, which is why it cannot be seen.

Science Project: If you took a red diode light and put it in milk, it would appear blue in color because milk filters the red out much like our fat/skin. Try it and see!

Blood Vessels

What are tubes that carry blood called?

Blood travels through the tubes known as blood vessels. There are three types of blood vessels: arteries, veins, and capillaries. Arteries always carry blood away from your heart, and veins take blood to the heart. Capillaries connect arteries and veins. The body's main artery, the pulmonary artery, takes blood from the heart. The pulmonary vein takes blood to it.
The Veins are the "tubes" in our bodies that carry blood throughout the body.
One kind of tube that carries blood around the body is the vein.
Blood vesicles, ie arteries and veins.


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