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27 28 Learning About the Excretory System Who Took the Insulin? Removing waste products from the body is the major function of the excretory system. It works with both the respiratory and circulatory system to remove these wastes. There are four major organs in the excretory system. These organs are the lungs, liver, kidneys and skin. You have learned that the lungs excrete carbon dioxide waste. The lungs also excrete small amounts of heat and water. The skin excretes most of the body’s waste heat. In addition, the skin removes some water and salts. These wastes are excreted by the skin as sweat. This sweat helps your body cool off. The liver filters the blood and changes harmful materials, such as alcohol, to harmless materials. The kidneys excrete a liquid waste called urine. The food you eat supplies glucose (type of sugar) to the cells for energy. If you have the disease called diabetes then the glucose does not go into the cells because an organ called the pancreas is not producing insulin. The glucose stays in the blood where it is filtered by the kidneys and placed in the urine to be excreted. If the pancreas is not working correctly diabetics must take injections of insulin that they get from their doctor. Without insulin the body cannot maintain its balance. You get ________ and eat _______. Materials: colored pencils What To Do: 1. Label 1 SKIN and outline it in brown. 2. Label 2 lungs and color them pink. 3. Label 3 liver and color it purple. 4. Label 4 kidneys and color them yellow. Blood glucose levels _____ _________. Body turns food into _______ and blood glucose level ____ _____ Maintaining Blood Glucose levels 1 2 Pancreas releases ______ to make cells use glucose. Cells use glucose and oxygen to make __________ 3 4 29 29 insulin food goes up Word Bank hungry glucose energy goes down Last night there was a robbery at the Springfield Drug Store. Ten bottles of insulin were taken. The Springfield Police Department has eight likely suspects and they believe the perpetrator is probably diabetic. All of the suspects have given a urine sample. A color Materials: numbered urine samples in test change tubes, universal indicator, suspect sheet from yellow What To Do: to 1. Look at the suspect sheet and place the blue/purple name of each suspect in the chart. indicates 2. Each table is testing one suspect’s urine. there is 3. Place 5 drops of universal indicator in the sugar in the test tube. urine. 4. Swirl the test tube around so the liquids mix well. 5. Observe the color of the urine. Record. 6. Share your findings with the class. Name of Suspect Color of urine before testing Color of urine after testing Diabetic (yes/no) Last night there was a robbery at the Springfield Drug Store. Ten bottles of insulin were taken. The Springfield Police Department has eight likely suspects and they believe the perpetrator is probably diabetic. All of the suspects have given a urine sample. A color Materials: numbered urine samples in test change tubes, universal indicator, suspect sheet from yellow What To Do: to 1. Look at the suspect sheet and place the blue/purple name of each suspect in the chart. indicates 2. Each table is testing one suspect’s urine. there is 3. Place 5 drops of universal indicator in sugar in the the test tube. urine. 4. Swirl the test tube around so the liquids mix well. 5. Observe the color of the urine. Record. 6. Share your findings with the class. Name of Suspect 1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. Color of urine before testing Color of urine after testing Diabetic (yes/no) Questions: 1. Who took the insulin? __________________________ Questions: 1. Who took the insulin? __________________________ 2.29How do you know? __________________________ 2. How do you know? __________________________ Do not glue in your ISN. Keep in your HOTS pocket. Do not glue in your ISN. Keep in your HOTS pocket. 30 Name ______________ period _____ EXIT TICKET 1. Which of the following is NOT a waste from the human body? A. Sweat B. Urine C. Heat D. Sweet 2. Which of the following is part of the excretory system? A. Stomach B. Kidneys C. Heart D. Small Intestine Name ______________ period _____ EXIT TICKET 1. Which of the following is NOT a waste from the human body? A. Sweat B. Urine C. Heat D. Sweet 2. Which of the following is part of the excretory system? A. Stomach B. Kidneys C. Heart D. Small Intestine 3. What part of the body is not working correctly if we have diabetes? A. Stomach B. Pancreas C. Heart D. Small Intestine 3. What part of the body is not working correctly if we have diabetes? A. Stomach B. Pancreas C. Heart D. Small Intestine Conclusion: ( oxygen, wastes, cells, function, glucose, balance, insulin) The major function of the excretory system is to remove Conclusion: ( oxygen, wastes, cells, function, glucose, balance, insulin) The major function of the excretory system is to remove __________. Another_____________ of the system is to __________. Another_____________ of the system is to keep our body in ______. Our cells use __________ and keep our body in ______. Our cells use __________ and ________ to make energy. To keep our blood glucose ________ to make energy. To keep our blood glucose levels stable, our body produces ________. The insulin levels stable, our body produces ________. The insulin allows the _____ to use the glucose. allows the _____ to use the glucose.