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UNIT 4

THE HUMAN BODY. UNIT 4. walk. Ride a bike. exercise. swim. Get enough sleep. run. Proteins. Minerals. health. Eat a balanced diet. Fats. Vitamins. carbohydrates. brush teeth to remove plaque. Keep clean. Wash hands before eating. THE DIGESTION PROCESS.

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UNIT 4

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  1. THE HUMAN BODY UNIT 4

  2. walk Ride a bike exercise swim Getenoughsleep run Proteins Minerals health Eat a balanceddiet Fats Vitamins carbohydrates brushteethtoremove plaque Keepclean Washhandsbeforeeating

  3. THE DIGESTION PROCESS The digestive process starts in the mouth. We chew our food and mix the food with the saliva. Our food passes to the oesophagus and then to our stomach. The remains of the food that our body can’t use go tothe large intestines. Here our body has its last chance to take water from the food. The remains finally leave our body through the anus

  4. THE DIGESTIVE SYSTEM mouth liver oesophagus stomach pancreas Large intestine anus Small intestine

  5. Theexcretorysystem kidneys ureters Renal artery bladder Renal vein urethra

  6. The excretory system The kidneys clean the waste from our blood. This waste combines with water to make urine. Urine goes down the ureters, and collects in the bladder. When the bladder starts to get full, the body tell us that it’s time to go to the toilet. Urine then leaves the body through the urethra.

  7. The respiratory system When we inhale, air enters our body through our nose and mouth.Tiny hairs inside the nose trap dust particles and clean the air. The air then passes through the pharynx and larynx as it goes down to the trachea. The trachea divides into two parts called bronchi. The air travels down the bronchi into the lungs. The bronchi divide into small tubes called bronchioles. At the end are alveoliwhich are covered in blood vessels. Here , the oxygen in the air is absorbed into the blood. Waste carbon dioxide passes from the blood to the alveoli. This exchange the gases is called respiration.

  8. THE RESPIRATORY SYSTEM pharynx nose mouth trachea larynx lung bronchioles bronchi alveoli diaphragm

  9. THE CIRCULATORY SYSTEM Pumpsthebloodaroundthebody. large with thick walls carry oxygenated blood from the heart to the rest of the body. thinner walls carry blood back to the heart. tiny connect arteries and veins yellowish liquid made up of 90% water carries nutrients and waste products carryoxygen and carbondioxidecontainhaemoglobin fightinfection join together when the body is losing blood

  10. Pulmonaryartery aorta Pulmonaryvein Leftatrium Rightatrium Leftventricle Rightventricle

  11. Complete the following sentences. Red blood cells carry _________________________________________________________________________________. The blood gets oxygen from the ___________________________________. Blood carries ___________________________ from the small intestine. ____________________ blood cells fight germs. Blood travels to all parts of the ___________________________. The liquid part of blood is called __________________________. ________________ blood cells give blood its colour. ________________ form blood clots.

  12. REVISION • Nutrition is a very complex process in humans. • Four body systems have to work together to perform the process. • The digestive system breaks down the food into nutrients. • The circulatory system takes the nutrients and oxygen to all parts of the body. • The respiratory system obtains oxygen from the air. Oxygen is necessary for the transformation of the nutrients into energy. • The excretory system eliminates harmful waste produced in the process

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