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What are the Digestive and Urinary systems? DIGESTIVE SYSTEM Body first has to digest or break down food small materials Can Cells use food if it not broken down? the food enters the blood into the cell 1. THE MOUTH Chewing food (Teeth-adults have 32) is the first step of digestion Tongue moves food so it can be chewed & have taste buds – pushes food to be swollowed Saliva also has chemicals that digest food ( it moisten food) EPIGLOTTIS Moves to cover your trachea when you swallow no food goes into the wrong pipe food goes into the esophagus 2.ESOPHAGUS Tube that carries food to the stomach Esophagus pushes food by squeezing its rings of muscles in a pattern. 3.STOMACH A tight round muscle at the bottom on the esophagus Mouth Esophagus Stomach The muscle prevent food from moving back to the esophagus. Stomach walls can stretch to store all food from a meal Stomach walls squeeze food with the help of fluids. The walls of the stomach ooze mucus to form a protective lining and to keep the stomach from being digested. 4.INTESTINES Mouth Esophagus Stomach Intestines Its muscles squeeze food coming from the stomach along in one direction Liver &Pancreas send chemicals to digest food in intestines VILLI Tiny finger shaped structures that give the small intestine more surface area to absorb food. LARGE INTESTINE (COLON) Food waste moves to a wider tube called large intestine Helpful bacteria make vitamins & keep bacteria causing diseases away. Large intestine takes water and salts from wastes solid waste Muscles squeeze to push the waste out of the body THE URINARY SYSTEM Body cells form wastes which poison the body if not removed. Urinary system gets rid of the waste in the blood KIDNEYS Remove waste from your blood Regulate and control levels of water, salt, calcium, nutrients and other chemicals in body. URINARY BLADDER The bladder stores urine until it leaves the body Urine= Waste + Water LUNGS Carbon dioxide also is a waste product. It’s removed by the lungs – takes in oxygen & removed carbon dioxide ACTIVITIES Draw a flow diagram explaining the path of the food being digested. ACTIVITIES True or False: 1. Chewing makes food large enough to be swallowed. 2. Saliva has chemicals that digest food. 3. If someone stands upside down, he won’t be able to swallow anymore. 4. The kidneys have no role in the urinary system ACTIVITIES Fill in the blanks 1. Food has to be changed broken down before your -------- use it. 2. The -------------- pushes food to the stomach by squeezing its rings of muscles in a pattern. 3. The ---------- moves to cover your trachea when you swallow. 4. ----------- help small intestine do its job by increasing the surface area. PROJECT In groups of 4 or 5 1. You need to draw a digestive system model 2. First draw a sketch or print a big sketch of the digestive system on a card board 3. You’ll need to label the model 4. Use any material in order to fill in the organs as seen in the proceeding slide. LINKS http://www.sheppardsoftware.com/health/anatom y/digestion/digestion_tutorial.htm http://kitses.com/animation/swfs/digestion.swf