Nutrition by Andrea del Hoyo

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Nutrition by Andrea del Hoyo

  1. 1. NutritionBYAndrea del hoyo<br />SCIENCE<br />
  2. 2. Thefunction of nutrtion<br />Thefunction of nutritiongivesourcellsalltheenergytheyneed.<br />Fourbodysystemscarryoutthefunction of nutrition:<br /> -Digestivesystem.<br />-Respiratorysystem.<br />-Circulatorysystem.<br />-Excretorysystem.<br />
  3. 3. Digestion and thedigestivesystem<br />Digestionistheprocesses in whichfoodchangesintonutrients.<br />Thedigestivesystem has twoparts:<br /> -Thedigestivetract: Itsparts are themouth, thepharynx, theoesophagus, thestomach, thesmallintestine and thelargeintestine.<br /> -Glands:Theyreleasechemicals.They are thesalivaryglands, theliver and thepancreas.<br />
  4. 4. Thedigestivesystem<br />
  5. 5. Breathing<br />Breathingistheprocesseswherethebodytakes in oxigen and releasescarbondioxide.<br />Twoprocessestake place:<br /> -Lungventilation: Inhalingiswhen air goesintothelungs.Exhalingsends air out of thelungs.<br /> -Exchange of gases: Theoxigenbreathing in goestotheblood and thecarbondioxidefromthebloodmovestothelungs.<br />
  6. 6. Therespiratorysystem<br />Therespiratorysystemcarriesoutbreathing. Itconsists of:<br /> -Respiratorytract: Itismade up of thenostrils, larynx, pharynx, trachea, bronchi and bronchioles. <br /> -Lungs: They are twospongyorgansmade up of millions of small bags calledalveoli, wheregasses are exchanges. <br />
  7. 7. Therespiratorysystem<br />
  8. 8. Excretion and theexcretorysystem<br />Excretionistheelimination of wastesubstancecollected in.<br />Theexcretorysystemismade up of:<br /> -Sweatglands: They are in theskin and produce sweat.<br /> -Urinarysystem: Ismade up of:<br /> -Kidneys. <br />-Urinarytract.<br />
  9. 9. Theurinarysystem<br />
  10. 10. Circulation and thecirculatorysystem<br />Circulationisthetransportation of bloodthroughthecirculatorysystem, carryingnutrients and oxigentoallthecells and collectingwastesubstances.<br />Thecirculatorysystemismade up of:<br /> -Heart.<br /> -Blood.<br /> -Bloodvessels.<br />
  11. 11. Heart<br />Itisdividedintotwopartsseparatedby a wallcalledtheheartseptum.<br />Eachhalf of theheartisdividedintotwocavities:<br /> -Atrium: Itistheuppercavity.<br /> -Ventricle: thecavityissmaller.<br />Theheart uses rhythmicsystole and diastolemovementstopumpsblood.<br />
  12. 12. Blood<br />Itcollectsoxigen, nutrients, carbondioxide and wastesubstances.<br />Bloodcells: There are differenttypes of cells:<br />-Red bloodcells: Theycarryoxigen.<br /> -White bloodcells: They are thebody’sdefencecells.<br /> -Platelets: Theyformbloodclots.<br />Blood plasma.<br />
  13. 13. Blood<br />
  14. 14. Bloodvessels<br />They are threetypes:<br /> -Arteries: Theycarrybloodfromthehearttotherest of thebody.<br /> -Veins: Theycarrybloodfromtheentirebody back totheheart.<br /> -Capillaries: They are verythinvessels.<br />
  15. 15. Thecirculatorysystem<br />
  16. 16. Theend<br />

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