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Blood vessels are complicated networks of hollow tubes that can carry blood all the way through the entire body. Blood delivers nutrients to and removes wastes from the cells. Blood vessels are the part of the circulatory system that transports blood all the way through the human body. There are three major types of blood vessels that includes the arteries, which transport the blood away from the heart, the capillaries, which allow the actual exchange of water and chemicals between the blood and the tissues and the veins, that carry the blood from the capillaries back toward the heart. Types of Blood Vessels include arteries: these are elastic vessels that transport blood away from the heart. Veins: Veins are elastic vessels that transport blood to the heart. Capillaries: Capillaries are very small vessels located inside the tissues of the body that transport blood from the arteries to the veins. Sinusoids: Sinusoids are very small vessels located within the liver, spleen and bone marrow.
Structure of Blood Vessel: The arteries and veins have three layers, however the middle layer is thicker in the arteries than it is in the veins, Tunica intima is the thinnest and single layer of simple squamous endothelial cells glued by a polysaccharide intercellular matrix, surrounded by a thin layer of sub endothelial connective tissue interlaced with a number of circularly arranged elastic bands called the internal elastic lamina. Tunica media is the thickest layer in the arteries circularly arranged elastic fiber, connective tissue, polysaccharide substances, the second and third layer are separated by another thick elastic band called external elastic lamina.Blood vessels are part of the circulatory system, collectively with the heart and the blood. Blood vessels do not actively engage in the transport of blood as they have no appreciable peristalsis, however arteries and veins to a degree can control their inner diameter by contraction of the muscular layer.
Vasodilation and vasoconstriction are also used antagonistically as methods of thermoregulation. The blood pressure in blood vessels is usually expressed in millimeters of mercury. In the arterial system, this is usually around 120 mmHg systolic high pressure wave due to contraction of the heart and 80 mmHg diastolic is low pressure wave. In contrast, pressures in the venous system are constant and rarely exceed 10 mmHg.
OMICS Group is an amalgamation of Open Access publications and international science conferences. Established in the year 2007 with the sole aim of making the information on Science and technology ‘Open Access’, OMICS Group publishes 400 online open access scholarly journals in Science, Engineering, Management and Technology. OMICS International Conferencessets an ideal path for international association triggering and inspiring scientific society with the newest research work. The Symposia, workshops and exhibitions are the key specialties of the OMICS Group Meetings. The Scientific world and business delegates at the conferences have praised the conferences for their networking opportunities in its B2B and Scientific Meetings.OMICS Group adds value to its conventions by identifying outstanding speakers and delegates from various parts of the world.
3rd International Conference on Hematology & Blood Disorders 2014
Society for Hematology and Stem Cells - ISEH
43rd Annual Scientific Meeting 2014
The 8th International Conference on Advanced Technologies & Treatments for Diabetes
The 6th International Conference on Fixed Combination in the Treatment of Hypertension, Dyslipidemia and Diabetes Mellitus
27th International Symposium on Cerebral Blood Flow, Metabolism and Function
China Cord Blood Corporation
Vivi Cells International
Lazaron Biotechnologies (SA) Ltd
NHS Cord Blood Bank
Florida's Blood Centers
New York Blood Center
Association and Societies American Association of Blood Banks, USA
International Society of Blood Transfusion (ISBT), Netherlands
American Society of Hematology, USA
American heart Association, USA
National Institute of health
Blood Pressure, UK
French Voluntary Blood Donors' Association
International Federation of Blood Donor Organizations, France
National Union of Voluntary Blood Donors' Associations
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This page was last updated on 10th Oct, 2014
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