Nutrition by Paula

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Nutrition by Paula

  1. 1.  The funtion of nutrition is esential to life. The digestive system,the respiratory system,the circulatory system and the excretory system carry out the funtion of nutrition.
  2. 2.  The digestive system has two parts : the digestive tract and the digestive glands.
  3. 3.  1-The mouth has salivary glands that produces saliva,theet that chew food and a tonge that mixes chewed food with saliva to form a ball of food. 2-The pharynx connects the mouth and the oesophagus.
  4. 4.  3-The oesophagus transports the food to the stomach. 4-The stomach is where the food mixes with gastric juices. 5-The liver secretes bile. 6-The pancreas helps in the digestion of proteins.
  5. 5.  7-The small intestine is the longest part of the digestive tract.Nutrients pass into the blood through its walls. 8-The large intestine absorbs water which passes to the blood.And finally,undigestive substances are expelled through the anus.
  6. 6. THE DIGESTIVE SYSTEM The funtion of the respiratory system is breath The respiratory system makes two movements: Inhale:the air goes into the lungs. Exhale:the air goes outside the body
  7. 7. PARTS OF THE RESPIRATORY SYSTEM 1-The nostrils are two openings in the nose. They filter the air that we breathe 2-The pharynx connects the larynx,the oesophagus and the trachea 3 – the larynx contains the vocal cords.They produce sound.
  8. 8. PARTS OF THE RESPIRATORY SYSTEM II 4-The trachea is a tube that takes air into the bronchi 5-the bronchi are two branches of the trachea.They take air to the lungs. 6-The lungs are spongy organs made up of small sacs called alveoli.
  9. 9. PARTS OF THE RESPIRATORY SYSTEM III 7-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. 8-the diaphragm is the muscle that creates the movements involved in breathing.
  10. 10. PICTURE OF THERESPIRATORY SYSTEM
  11. 11.  Theexcretory system filters waste substances from the blood. It removes them from the body through excretion. The excretory system is made up of : The urinary system :This is made up of the kidneys and the urinary tract Sweat glands : in the skin
  12. 12.  1-The kidneys remove waste substances from the blood and they make urine. 2-the ureters take urine from the kidneys to the bladder. 3-The bladder stores the urine. 4-the urethra connects the bladder to the outside.
  13. 13. THE CIRCULATORY SYSTEM The circulatory system transports nutrients and oxygen to our cells. It is made up of heart,blood and blood vessels. Heart:is a muscular organ that pumps blood around the body. Blood :collects oxygen from the alveoli and nutrients and transports them to all the cells.
  14. 14. THE CIRCULATORY SYSTEM II The blood vessels:are the tubes through which blood circulates.There are three types of blood vessels: Arteries:carry blood from the heart to the rest of the body. Venis:carry blood from over the body back to the heart Capillaries:are very thin vessels that reach all the cells of the body.
  15. 15. PICTURE OFCIRCULATORY SYSTEM
  16. 16.  The blood is a red liquid tissue made up of cells that float in a liquid called plasma. There are three types of red blood cells: Red blood cells carry oxygen. White blood cells remove bacteria and viruses from the blood. Plateles are small fragments of cells that form blood clots.
  17. 17.  The heart uses rhythmic systole and diastole movements to pump the blood around the body. Blood enters the atria through the veins and passes to the ventricles.Blood comes out of the ventricles,through the arteries and travels all over the body.
  18. 18.  Human circulation is closed and double. Human circulation is closed:in mammals,the heart septum separetes the two halves of the heart. Human circulation is double:the blood follows two routes: Pulmonary circulation Systemic circulation

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