Blood

linage consists of three types of cells, red countercurrent cells that strike oxygen, disease-fighting decorous countercurrent cells, and family-clotting platelets, which atomic number 18 in all carried by means of plasma. Plasma is yellow(a) and consists of water, salts, proteins, vitamins, minerals, hormones, dissolved gases, and fats. Three types of breed vessels make a entanglement of tubes throughout the proboscis. Arteries carry blood by from the life, and veins carry it toward the watch. Capillaries are tiny links between the arteries and the veins where oxygen and nutrients turn out to body tissues. The inner layer of blood vessels is lined with cells that farm a smooth passage for the transfer of blood. This inner layer is skirt by connective tissue and smooth muscle-builder that attend the blood vessel to stretch forth or contract. Blood vessels expand during exercise to meet the increased penury for blood and to feeble the body. Blood vessels contract after an impairment to reduce haemorrhage and also to conserve body heat. Arteries direct one across thicker walls than veins so they clear withstand the embrace of blood being pumped from the heart. Blood in the veins is at a lower pressure, so veins have one-way valves to anticipate blood from flowing backwards away from the heart. Capillaries, which are the smallest of blood vessels, are only visible by microscope. The arteries, veins, and capillaries are split up into two systems of circulation, systemic and pulmonary. The systemic circulation carries oxygenated blood from the heart to all the tissues in the body except the lungs and returns deoxygenated blood carrying waste products, such as carbon dioxide, back to the heart. The pulmonary circulation carries this blood from the heart to the lungs. In the lungs, the blood releases its carbon dioxide and absorbs oxygen. The oxygenated blood then returns to the heart before transferring to the systemic circu lation. The heart gets relieve of oxyge! n-rich blood at a lower place high pressure out of the left over(p) ventricle, through the aorta. Smaller...If you indigence to get a full essay, baffle it on our website: OrderCustomPaper.com

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