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2/22/12 The function and importance of the circulatory system. • Transportation of materials. • Contains cells that fight infection. • Helps stabilize the pH and ionic concentration of the body fluids. • It helps maintain body temperature by transporting heat. This is particularly important in homeothermic animals such as birds and mammals. Blood vessels. • The three types of blood vessels are arteries, capillaries, and veins. • Each blood vessel consists of a layered wall surrounding a central blood-containing space, or lumen. • Blood vessels carry the blood throughout the body and supply nutrients to everything. Heart! The route of blood through our heart. Composition of blood. Erythrocytes • As you can see, the structures and functions of erythrocytes, are red blood cells, white blood cells, and platelets. Open vs Closed Systems • An open circulatory system is found in all arthropods. The blood is propelled through the body by a tubular heart and collected in areas called sinuses. • A closed circulation contains a heart connected to a mass of connected blood vessels that allows the blood to circulate throughout the body without leaving the circulatory pathway. Fish Circulation • A fish has a closed circulatory system. Amphibian Circulation • Amphibians have a closed circulatory system. Reptile Circulation • Reptiles have a closed system. Mammal Circulation • Mammals have closed circulatory systems! Hypertension • Blood pressure is the force of blood pushing against the walls of your arteries. High blood pressure means that your blood is moving through your arteries with a pressure higher than normal. The higher the pressure inside your arteries, the higher your blood pressure numbers will get. Atherosclerosis • A disease in which plaque builds up inside your arteries. Then restricts blood flow. References • • • • • • • • • http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20102%20lectures/circulatory%20system/ci rculat.htm http://www.ehow.com/about_5082107_function-blood-vessels.html www.google.com http://www.google.com/imgres?um=1&hl=en&sa=N&biw=1366&bih=541&tbm=isch&tbnid=1vtBn37cBWZyM:&imgrefurl=http://www.yourimt.com/atherosclerosisfacts.html&docid=Y2_16cBXvwXo1M&imgurl=http://www.y ourimt.com/images/277_ATHERO_4.jpg&w=277&h=277&ei=bzNNTKoMKuDsgLjzsUD&zoom=1&iact=hc&vpx=336&vpy=218&dur=203&hovh=221&hovw=221&tx=86&ty=176&sig=1137605214 77347480570&page=1&tbnh=147&tbnw=147&start=0&ndsp=13&ved=1t:429,r:2,s:0 http://www.google.com/imgres?um=1&hl=en&sa=N&biw=1366&bih=541&tbm=isch&tbnid=1vtBn37cBWZyM:&imgrefurl=http://www.yourimt.com/atherosclerosisfacts.html&docid=Y2_16cBXvwXo1M&imgurl=http://www.y ourimt.com/images/277_ATHERO_4.jpg&w=277&h=277&ei=bzNNTKoMKuDsgLjzsUD&zoom=1&iact=rc&dur=94&sig=113760521477347480570&page=1&tbnh=147&tbnw=147&start=0&ndsp =13&ved=1t:429,r:2,s:0&tx=108&ty=52 http://en.wikipedia.org/wiki/Hypertension http://en.wikipedia.org/wiki/Red_blood_cell http://www.google.com/imgres?imgurl=http://www.medicalook.com/systems_images/Erythrocytes_large.jpg&imgrefurl=ht tp://www.medicalook.com/human_anatomy/organs/Blood.html&h=664&w=925&sz=52&tbnid=Vz11hIgtxIclM:&tbnh=90&tbnw=125&zoom=1&docid=pMyvw7y5U8ikM&hl=en&sa=X&ei=tjRNT7XKGIrDgAey6vHnCA&ved=0CFoQ9QEwBQ http://www.google.com/imgres?um=1&hl=en&sa=N&biw=1366&bih=541&tbm=isch&tbnid=daQk1llVPdg0_M:&imgrefurl=h ttp://isisthescientist.com/2010/03/01/the_controversy_of_surgically/&docid=qRU9kcYEe7coNM&imgurl=http://scienceblog s.com/isisthescientist/blood%252520path.gif&w=450&h=332&ei=5TVNT8GXGbDLsQLM44ki&zoom=1&iact=hc&vpx=123&v py=230&dur=153&hovh=193&hovw=261&tx=169&ty=189&sig=113760521477347480570&page=1&tbnh=159&tbnw=216& start=0&ndsp=11&ved=1t:429,r:6,s:0