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THE TRANSPORT SYSTEM

THE TRANSPORT SYSTEM. By: Virginia Posada & Ana Maria Racines. DEFINITIONS. Artery: are blood vessels that carry blood away from the heart. (Most carry oxygenated blood). Vein: are blood vessels that carry blood towards the heart. (Most veins carry deoxygenated blood.)

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THE TRANSPORT SYSTEM

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  1. THE TRANSPORT SYSTEM By: Virginia Posada & Ana Maria Racines

  2. DEFINITIONS • Artery: are blood vessels that carry blood away from the heart. (Most carry oxygenated blood). • Vein: are blood vessels that carry blood towards the heart. (Most veins carry deoxygenated blood.) • Heart Valve: it normally allows blood flow in one direction through the heart. There are four valves in the mammalian heart.

  3. JOB OF THE CIRCULATORY SYSTEM • Transport materials throughout the body. It transports nutrients, water, and oxygen to your body cells and carries away wastes such as carbon dioxide that body cells produce.

  4. HEART • The heart is located in the center of your chest slightly to the left. It's job is to pump your blood and keep the blood moving throughout your body.

  5. DIAGRAM OF THE HEART

  6. CORONARY ARTERIES • The coronary arteries deliver blood to the heart muscle, providing a continuous supply of oxygen and nutrients needed for it to stay healthy and function normally. • Blood is supplied to the heart by its own vascular system, called coronary circulation. • Your left ventricle pumps blood into the main artery of your body, called the aorta. Close to the heart, the two main coronary arteries branch off of your aorta.

  7. The left main coronary artery is a short vessel that branches into the: • Left anterior descending artery, which supplies blood to the front (anterior wall) and part of the side (anterolateral wall) of the left ventricle, to the top of the left ventricle, and to most of the wall between the ventricles (interventricular septum). • Circumflex artery, which passes behind the heart between the left atrium and left ventricle and supplies blood to the side (lateral wall) of the left ventricle. In a small number of people, the circumflex artery supplies the lower and back portions of the left ventricle. • The right coronary artery supplies blood to the right ventricle and then supplies the underside (inferior wall) and backside (posterior wall) of the left ventricle.

  8. ACTIONS OF THE HEART • Atriacollectbloodfromveins. • Atriacontractatrioventricularvalves open. • Bloodispumpedintoventricles. • Ventriclecontracts, atrioventricularvalvesclose and semilunar valves open. • Bloodispumpedintoarteries, semilunar valvesclose.  • Cyclerepeats.  http://www.youtube.com/watch?v=JA0Wb3gc4mE&NR=1

  9. THE CONTROL OF THE HEART BEAT • Theheartmuscletissue can contractonitsown , it is called myogenic muscle contraction. • Region responsible for initiating each contraction: pacemaker.

  10. THE BLOOD • Blood is composed of plasma, erythrocytes (red blood cells), leukocytes)white blood cells and platelets.

  11. FUNCTIONS OF BLOOD • Blood carries oxygen and many other substances around your body. • Itsfunctionsistotransport and defenceagainstdisease.

  12. SUBSTANCES THAT THE BLOOD TRANSPORTS

  13. BIBLIOGRAPHY • HumanBody and Mind , BBC URL: http://www.bbc.co.uk/science/humanbody/body/factfiles/heart/heart.shtml • Human heart structure , URL:http://www.tutorvista.com/content/biology/biology-ii/transportation/heart.php

  14. QUIZ

  15. 1.)Howmanychambersdoesthehearthave ? • A.Six • B.Five • C.Four • D.Three

  16. 2.)The movement of blood trough the heart and body is called: • A.Circulation • B.Locomotion • C. Ventriculation • D.HeartPump

  17. 3.)Thebeatingsoundfromyourheart comes from: • A.Bloodgoing in wrongdirection • B.Valves in yourheartclosing • C.Theheartskippingbeats • D.Pacemaker

  18. 4.)Theatria are the ´´upstairs´´ chambers of yourheart and theseparts are the ´´downstairs´´ of yourheart • A.Valves • B.Ventricles • C.Blood • D.Pulmonaryarteries

  19. 5.)Whatwallseparatestheright and leftside of theheart • A.Ventricle • B.Atrium • C.Septum • D.Thegreatwall

  20. 6.)Thetubesthatcarryblood back totheheart : • A.Arteries • B.Veins • C.Pipes • D.Tubas

  21. 7.)Whatisthemainfunction of thecirculatorysystem? • A.Carriesinsidecarbondioxide • B.Helpusbreathe • C.Tosupplybloodtothebody • D.Controlthebloodflowaroundthebody

  22. 8.)Thebloodleavingthe aorta • A.Redbloodcells • B.Carbondioxide • C. Oxygen • D.Whitebloodcells

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