Understanding the Circulatory System and Its Components

Understanding the Circulatory System and Its Components

This article discusses the importance of the circulatory system in carrying blood and dissolved substances throughout the body. The focus is on the heart, which acts as the pump to distribute blood and substances

About Understanding the Circulatory System and Its Components

PowerPoint presentation about 'Understanding the Circulatory System and Its Components'. This presentation describes the topic on This article discusses the importance of the circulatory system in carrying blood and dissolved substances throughout the body. The focus is on the heart, which acts as the pump to distribute blood and substances. The key topics included in this slideshow are . Download this presentation absolutely free.

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Slide1S. MORRIS 2006

Slide2     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?

Slide3lungshead & arms liver digestive system kidneys legs pulmonary artery aorta pulmonary vein main vein Left Right How does this system work? Circulatory System

Slide4LungsBody cells 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.

Slide5The HeartThese 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

Slide6The HeartLeft 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

Slide7How does the Heart work?blood from the body blood from the lungs The heart beat begins when the heart muscles   relax  and blood flows into the atria. STEP ONE

Slide8The atria then contract  and the valves  open  to allow blood into the ventricles. How does the Heart work? STEP TWO

Slide9How does the Heart work?The valves  close  to stop blood flowing backwards. The ventricles  contract  forcing the blood to leave the heart. At the same time, the atria are relaxing  and once again filling with blood. The cycle then repeats itself . STEP THREE

Slide10blood from the heart gets aroundthe body through blood vessels There are 3 types of blood vessels a.     ARTERY b .        VEIN c.        CAPILLARY

Slide11The ARTERYthick 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.

Slide12The VEINVeins 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.

Slide13The CAPILLARYCapillaries 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.

Slide14arteryvein capillaries body cell The CAPILLARY capillary  bed A collection of capillaries is known as a  capillary  bed .

Slide15http://video.search.yahoo.com/video/play;_ylt=a2klqIOgd3VRQCMAa_P7w8QF;_ylu=X3oDMTBvcXNvNnBqBHNlYwNzcgRzbGsDdmlkBHZ0aWQDVjEzMw-- ?p=circulatory+system&vid=aaf49fcc5cc37122f9505f774e51b213&l=1%3A07&turl=http%3A%2F%2Fts3.mm.bing.net%2Fth%3Fid %3DV.4565413813092602%26pid%3D15.1&rurl=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DPgI80Ue- AMo&tit=CIRCULATION&c=2&sigr=11aee7n75&age=0&fr=yfp-t-900-s&vm=r&tt=b School House Rock… http://video.search.yahoo.com/video/play;_ylt=A2KLqIOgd3VRQCMAa_P7w8QF;_ylu=X3oDMTBvcXNvNnBq BHNlYwNzcgRzbGsDdmlkBHZ0aWQDVjEzMw-- ?p=circulatory+system&vid=aaf49fcc5cc37122f9505f774e51b213&l=1%3A07&turl=http%3A%2F%2Fts3.mm. bing.net%2Fth%3Fid%3DV.4565413813092602%26pid%3D15.1&rurl=http%3A%2F%2Fwww.youtube.com%2F watch%3Fv%3DPgI80Ue-AMo&tit=CIRCULATION&c=2&sigr=11aee7n75&age=0&fr=yfp-t-900-s&vm=r&tt=b

Slide16what’s inred blood cells white blood cells platelets plasma carbon dioxide digested food waste (urea) hormones oxygen

Slide17The Bloodplasma red blood cell white blood cell platelets

Slide18Red Blood Cellscontain  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

Slide19White Blood Cellsthere 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   .

Slide20PlateletsPlatelets  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.

Slide21PlasmaA  straw- coloured liquid  that carries the cells  and the platelets which help blood clot. •   c a r b o n  d i o x i d e •   g l u c o s e •   a m i n o  a c i d s •   p r o t e i n s •   m i n e r a l s •   v i t a m i n s •   h o r m o n e s •   w a s t e  m a t e r i a l s    l i k e   u r e a . It also contains useful things like;

Slide22SUMMARYcopy 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

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