Unit 3 nutrition clara s


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Unit 3 nutrition clara s

  2. 2. NUTRITION Nutrients give our cells all the energy they need. The digestive system the respiratory system the circulatory system and excretory system carry out function of nutition. THE DIGESTIVE SYSTEM The digestive system it has two parts, the digestive tract and the digesrive glands.
  3. 3. MOUTH The mouth has salivary glands that produce saliva, teeth that chew food and a tongue that mixes chewed food with saliva to form a ball of food
  4. 4. THE PHARYNX The pharynx connects the mouth and the oesophagus.
  5. 5. THE OESOPHAGUS The oesophagus transports the food to the stomach.
  6. 6. THE STOMACH The stomach is where the food mixes with gastric juices.
  7. 7. THE LIVER The liver secretes bile.
  8. 8. THE PANCREAS The pancreas helps in the digestion of protein.
  9. 9. THE SMALL INTESTINE The small intestine is the longest part of the digestive tract.Nutrients pass into the blood through its walls.
  10. 10. THE LARGE INTESTINE The large intestine absorbs water which passes to the blood . And finally, undigested substances are expelled through the anus.
  11. 11. THE RESPIRATORY SYSTEM The respiratory system is in change of breathing. Breathing makes two movements. First, we inhale air and it goes into the lungs. Then, we exhale air sending it out of the lungs.
  12. 12. THE NOSTRILS The nostrils filter the air .
  13. 13. THE PHARYNX The pharynx connet de larynx, the oesophagus and the trachea.
  14. 14. THE LARYNX The larynx contains the vocal cord.
  15. 15. THE TRACHEA The trachea is a tube that takes air into the bronchis.
  16. 16. THE BRONCHI  The bronchi are two branches of the trachea
  17. 17. THE LUNGS The lungs are spongy organs made up of small sacs called alveoli.
  18. 18. THE DIAPHRAGM The diaphragm is the muscle than creates the movements.
  19. 19. When we breathe, the oxygen in the air goes to the blood through the alveoli, and the carbon dioxide from the blood is released outside the body.
  20. 20. THE EXCRETORY SYSTEM The excretory system filters waste substances from the blood. It removes them from the body through excretion. The excretory system is made up of: Sweat glands The urinary system. This is made kidneys and urinary tract.
  21. 21. THE URINARY SYSTEM The kidneys remove waste substances from the blood and they make urine .
  22. 22. THE URETERS The ureters take urine from the kidneys to the bladder.
  23. 23. THE BLADDER The bladder stores the urine.
  24. 24. THE URETHRA The urethra connets the bladder to the outside.
  25. 25. THE CIRCULATORY SYSTEM The circulatory system transports nutrents and oxigen to cells .It is made up of the heart, blood and blood vessels.
  26. 26. THE HEART The heart is a muscular organ that pumps blood around the body.
  27. 27. BLOOD The blood collects oxygen from the alveoli and nutrients and transports them to all the cell. It also collects waste substances and takes them to the sweat glands and the urinary system.
  28. 28. BLOOD VESSELS The blood vessels are the tubes through which. There are three types: arteries, veins and capillaries.
  29. 29. ARTERIES The arteries carry blood from the heart to the rest of the body.
  30. 30. VEINS The veins carry blood from all over the boby back to the heart.
  31. 31. CAPILLARIES The capillaries are very thin vessels that reach all the cells of the body.
  32. 32. THE BLOOD Blood is a red liquid tissue made up of cells that float in a liquid called plasma. There are three types of blood cells, red blood cells. White blood cells and platelets.
  33. 33. *Red blood cells carry oxygen. *White blood cells remove bacteria and viruses from the blood. *Platelets are small fragments of Cells tha form blood clots when a Blood vessel breaks.
  34. 34. THE HEART The heart use rhythmic systole and diastole movements to pump the blood around the body. The systole is the movement of contraction. The diastole is the movement of relaxation.
  35. 35. Blood enters the atria through the veins. Passes to the ventricles and valves that prevent blood comes out. Of the ventricles, throug the arteries and travels all over the body.
  36. 36. HUMAN CIRCULATION Human circulation is closed.In mammals, the heart septum separates the two halves of the heart. Human circulation is double. The blood follows two routes -Pulmonary circulation. The blood carbon dioxide through the pulmonary artery. -systemic circulation.The blood with oxygen
  37. 37. THE END