IMPROVISEDURINARY SYSTEM MODEL By: DEMIE J. PABILLARAN, JR. Malaybalay City Central School Northern Mindanao, Philippines
Description:• The model is called “Improvised Urinary System Model”. It is made from recycled plastic bottles, rubber tubes and motorcycle fuel filter. This model aims to help teachers teach the pupils the process of investigating and explaining natural phenomena. It will aid the teacher to show the function of the kidney being the main organ of the urinary system thus, the learning objectives herein aim to provide the learners an opportunity to develop concepts and acquire the manipulative, creative and high-order thinking skills.
Target Audience:• This material can be used by both the teacher and the pupils in grade five.
Subject Matter/Learning Competency:BEC-PELC 2010I.3 Explain how the urinary system works I.3.1 Describe the main parts of the urinary system I.3.2 Describe the function of each part
21st CENTURY SKILLS:• Critical Thinking and Systems Thinking - pupils will be able to exercise sound reasoning in understanding and making complex choices; understanding the connections among systems
Duration:• The time allotted to use this model is 40-60 minutes or depending on the learning capability of the pupils.
Objectives:After using this material, the pupils should be able to: a. identify the urinary system and its major parts b. describe how urine is formed and eliminated from the body c. explain the main function of the kidney
Preparation:• Prerequisites: • 500 ml water • 2-5 pinches of powdered black pepper • 5 drops of Betadine solution or soy sauce
Instructions/Procedures:Before the class starts:• Have the model and other materials ready.• Mix the powdered pepper, 5 drops of Betadine or soy sauce in a 500 ml water in a bottle. (Make sure that the peppers are still visible after adding the Betadine or soy sauce. )• Shake well. This is your blood mixture.
Instructions/Procedures for useDuring the activity:• Show to the class the blood mixture that you have prepared and have them identify the its components. Explain to the class what the black pepper represents.• Transfer the mixture into one of the bottles of the model labeled “1”.• Hold the bottle “1” upright and gently squeeze until the mixture reaches the filter. Keep on squeezing until the water passes through the filter and flows to the other bottles labeled “2” and “3”.
Teaching Hints• After the activity, the teacher has the option to let the pupils label every bottle/part of the model for them to familiarize the parts and functions of the urinary system.e.g. bottle “1” – renal artery bottle “2” – urinary bladder 1 2 3
Evaluation:• Conduct debriefing. You may use the following questions/task:• 1. Tell me about your observation on the activity.• 2. What do you think does the bottle “1” represent? The bottle “2” and “3”. The filter? The tube from the filter to the bottle “2”?
Evaluation:• 3. If the powdered peppers are the “nitrogenous wastes”, can you describe their status after going through with that activity and where do you think they will go after that?• 4. What do you think will happen to the filter if you add more powdered pepper in your mixture? Why?• 5. What generalization or conclusion can you make from the activity?
The Improvised Urinary System Model• Renal artery• Renal vein• Ureter• Urinary bladder• Kidney