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Is blood a tissue in the circulatory system?
Blood vessels can be termed as organs, since an organ is a group of http://wiki.answers.com/dictionary/Tissuesthat perform a specific http://wiki.answers.com/dictionary/Functionor group of functions.The function of blood vessels is to circulate blood to various parts of the body.The tissues that make up blood vessels(arteries and veins) are- endothelial tissue(endothelium)-tunica intima, smooth muscle or muscular tissue- tunica media and connective tissue- tunica externa, while capillaries only contain endothilial tissue.
What is tunica intima?
The tunica interna, is a thin layer only a few cells thick of a vein and artery, made up of connective tissue and elastic fibers. It is sometimes referred to as the intima membrane. It is this layer that gives smoothness to the lining of the vessel, enhancing blood flow.
6 Why would the tunica media and tunica adventitia not be present in a capillary?
Because capillaries are very thin. many times as few as one red blood cell wide, and only have enough room for a layer of endothelial tissue, in the form of the Tunica Intima.
Are the walls of the veins thinner than those of the arteries?
No. Its the other way round.Walls of lymphatics (lymph vessels) are thinner than that of veins.Wall of lymph vessels consists only of a single layer of flat endothelial cells(with a few extensions into the lumen, as valves),while that of veins consists of innermost layer- of endothelial cells (tunica intima), middle layer-of smooth muscle cells (tunica media) and an outer layer- of connective tissue(tunica externa)
Are the only blood cells that function entirely in blood vessels?
The only blood cells that function entirely within the blood vessels are red blood cells.
What are the tiny blood vessels that are only the size of one cell?
The smallest blood vessels are called capillaries.
What Vessels are composed of endothelium only?
Capillaries are blood vessels that are composed of endothelium only. They are the smallest blood vessels in the body and are responsible for the exchange of gases, nutrients, and waste products between the blood and tissues.
What blood vessels is the only collect and distribute the oxygenated blood?
heart
Do your blood vessels grow as you grow?
As you grow, your blood vessels do as well. This is why only an adult human body's blood vessels, when all connected, can reach halfway to the moon, whereas a child's would not. These blood vessels also stretch when you grow or flex.
Damage to the small blood vessels can cause what to occur?
The organism not only damages the blood vessels by causing them to leak, but also causes clotting inside the vessels.
What set of blood vessels carry blood from the heart to all parts of the body except the lungs and back to the heart?
Systemic blood vessels. The ones that carry blood only to the lungs are called pulmonary vessels
Why does blood carry food in vessels?
they only do that for losers
