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Circulatory System PowerPoint Presentation

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Circulatory System Presentation Transcript

Slide 1 - Circulatory System S. MORRIS 2006
Slide 2 - The circulatory system carries blood and dissolved substances to and from different places in the body. The Heart has the job of pumping these things around the body. The Heart pumps blood and substances around the body in tubes called blood vessels. The Heart and blood vessels together make up the Circulatory System. What is the circulatory system?
Slide 3 - lungs head & arms liver digestive system kidneys legs pulmonary artery aorta pulmonary vein main vein Left Right How does this system work? Circulatory System
Slide 4 - Our circulatory system is a double circulatory system. This means it has two parts parts. the right side of the system deals with deoxygenated blood. the left side of the system deals with oxygenated blood.
Slide 5 - The Heart These are arteries. They carry blood away from the heart. This is a vein. It brings blood from the body, except the lungs. Coronary arteries, the hearts own blood supply The heart has four chambers 2 atria 2 ventricles now lets look inside the heart
Slide 6 - The Heart Left Ventricle Left Atrium Right Atrium Right Ventricle valve Vein from Lungs Artery to Head and Body Artery to Lungs Vein from Head and Body valve
Slide 7 - How does the Heart work? STEP ONE
Slide 8 - How does the Heart work? STEP TWO
Slide 9 - How does the Heart work? The cycle then repeats itself. STEP THREE
Slide 10 - blood from the heart gets around the body through blood vessels There are 3 types of blood vessels a. ARTERY b. VEIN c. CAPILLARY
Slide 11 - The ARTERY thick muscle and elastic fibres Arteries carry blood away from the heart. the elastic fibres allow the artery to stretch under pressure the thick muscle can contract to push the blood along.
Slide 12 - The VEIN Veins carry blood towards from the heart. thin muscle and elastic fibres veins have valves which act to stop the blood from going in the wrong direction. body muscles surround the veins so that when they contract to move the body, they also squeeze the veins and push the blood along the vessel.
Slide 13 - The CAPILLARY Capillaries link Arteries with Veins the wall of a capillary is only one cell thick they exchange materials between the blood and other body cells. The exchange of materials between the blood and the body can only occur through capillaries.
Slide 14 - artery vein capillaries body cell The CAPILLARY A collection of capillaries is known as a capillary bed.
Slide 15 - what’s in red blood cells white blood cells platelets plasma carbon dioxide digested food waste (urea) hormones oxygen BLOOD
Slide 16 - The Blood plasma red blood cell white blood cell platelets
Slide 17 - Red Blood Cells contain haemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it. can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries. a biconcave disc that is round and flat without a nucleus
Slide 18 - White Blood Cells there are many different types and all contain a big nucleus. the two main ones are the lymphocytes and the macrophages. some lymphocytes fight disease by making antibodies to destroy invaders by dissolving them. other lymphocytes make antitoxins to break down poisons. macrophages ‘eat’ and digest micro-organisms .
Slide 19 - Platelets Platelets are bits of cell broken off larger cells. Platelets produce tiny fibrinogen fibres to form a net. This net traps other blood cells to form a blood clot.
Slide 20 - Plasma A straw-coloured liquid that carries the cells and the platelets which help blood clot. carbon dioxide glucose amino acids proteins minerals vitamins hormones waste materials like urea. It also contains useful things like;
Slide 21 - SUMMARY copy and complete the following; Arteries take blood ______ from the heart. The walls of an artery are made up of thick _________ walls and elastic fibres. Veins carry blood ________ the heart and also have valves. The _________ link arteries and veins, and have a one cell thick wall. Blood is made up of four main things ______, the liquid part of the blood; Red Blood Cells to carry ______; White Blood cells to protect the body from disease and _________ to help blood clot. away platelets towards capillaries plasma oxygen muscular
Slide 22 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
 

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