Your blood is then drained out of the capillary beds and ready for its return trip to the heart by first going into small veins called venules and then merging into larger veins, which eventually flow back into the heart. Internet URLs are the best. The walls of arteries and veins have two additional layers, or tunics, forming too big of a barrier for there to be an exchange of gases and nutrients. Please try again later. This ultra-thin design is what allows for nutrients and gases to be exchanged in the capillary beds, and it's a unique feature of capillaries. Any text you add should be original, not copied from other sources. This is the muscular middle layer of the arteries and veins.
Internet URLs are the best. Our editors will review what you've submitted, and if it meets our criteria, we'll add it to the article. Vasoconstriction is a mechanism your body uses to regulate important functions in the body, such as body temperature and blood pressure. This is the muscular middle layer of the arteries and veins. When an artery constricts, the flow of blood decreases and the pressure within the vessel rises. Unfortunately, our editorial approach may not be able to accommodate all contributions. Layers of Blood Vessel Walls Like a busy highway, your blood vessels have to be well-constructed to withstand all the pressure that comes with circulating your blood every minute of every day. When the smooth muscle found within the tunica media is stimulated, it contracts, squeezing the walls of the artery and narrowing the vessel. Tunica Media Working our way from the inside of the vessel out, we see the next layer, called the tunica media. Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. Your blood is then drained out of the capillary beds and ready for its return trip to the heart by first going into small veins called venules and then merging into larger veins, which eventually flow back into the heart. To help stand up to the high demand, the walls of the blood vessels are constructed of three layers known as tunics. Every time your heart beats, blood is pumped into large arteries to start the one-way journey around your body. Any text you add should be original, not copied from other sources. Submit Thank You for Your Contribution! Tunica Intima The tunica intima is the innermost layer of the arteries and veins. Please try again later. The term vasoconstriction is used to describe the narrowing of the blood vessel due to contraction of the muscular wall. This ultra-thin design is what allows for nutrients and gases to be exchanged in the capillary beds, and it's a unique feature of capillaries. Uh Oh There was a problem with your submission. Your contribution may be further edited by our staff, and its publication is subject to our final approval. At the bottom of the article, feel free to list any sources that support your changes, so that we can fully understand their context. You can make it easier for us to review and, hopefully, publish your contribution by keeping a few points in mind. You can easily recall this by remembering that 'media' and 'middle' and 'muscular' all start with the same letter, which is 'm. Gillaspy has taught health science at University of Phoenix and Ashford University and has a degree from Palmer College of Chiropractic. So, why don't we go ahead and take a look at those two additional layers found within the walls of your arteries and veins. You can easily recall this term by remembering that 'intima' and 'innermost' both start with the letters 'in.
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