1. NutritionBYAndrea del hoyo SCIENCE

2. Thefunction of nutrtion Thefunction of nutritiongivesourcellsalltheenergytheyneed. Fourbodysystemscarryoutthefunction of nutrition: -Digestivesystem. -Respiratorysystem. -Circulatorysystem. -Excretorysystem.

3. Digestion and thedigestivesystem Digestionistheprocesses in whichfoodchangesintonutrients. Thedigestivesystem has twoparts: -Thedigestivetract: Itsparts are themouth, thepharynx, theoesophagus, thestomach, thesmallintestine and thelargeintestine. -Glands:Theyreleasechemicals.They are thesalivaryglands, theliver and thepancreas.

4. Thedigestivesystem

5. Breathing Breathingistheprocesseswherethebodytakes in oxigen and releasescarbondioxide. Twoprocessestake place: -Lungventilation: Inhalingiswhen air goesintothelungs.Exhalingsends air out of thelungs. -Exchange of gases: Theoxigenbreathing in goestotheblood and thecarbondioxidefromthebloodmovestothelungs.

6. Therespiratorysystem Therespiratorysystemcarriesoutbreathing. Itconsists of: -Respiratorytract: Itismade up of thenostrils, larynx, pharynx, trachea, bronchi and bronchioles. -Lungs: They are twospongyorgansmade up of millions of small bags calledalveoli, wheregasses are exchanges.

7. Therespiratorysystem

8. Excretion and theexcretorysystem Excretionistheelimination of wastesubstancecollected in. Theexcretorysystemismade up of: -Sweatglands: They are in theskin and produce sweat. -Urinarysystem: Ismade up of: -Kidneys. -Urinarytract.

9. Theurinarysystem

10. Circulation and thecirculatorysystem Circulationisthetransportation of bloodthroughthecirculatorysystem, carryingnutrients and oxigentoallthecells and collectingwastesubstances. Thecirculatorysystemismade up of: -Heart. -Blood. -Bloodvessels.

11. Heart Itisdividedintotwopartsseparatedby a wallcalledtheheartseptum. Eachhalf of theheartisdividedintotwocavities: -Atrium: Itistheuppercavity. -Ventricle: thecavityissmaller. Theheart uses rhythmicsystole and diastolemovementstopumpsblood.

12. Blood Itcollectsoxigen, nutrients, carbondioxide and wastesubstances. Bloodcells: There are differenttypes of cells: -Red bloodcells: Theycarryoxigen. -White bloodcells: They are thebody’sdefencecells. -Platelets: Theyformbloodclots. Blood plasma.

13. Blood

14. Bloodvessels They are threetypes: -Arteries: Theycarrybloodfromthehearttotherest of thebody. -Veins: Theycarrybloodfromtheentirebody back totheheart. -Capillaries: They are verythinvessels.

15. Thecirculatorysystem

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