Concept:
This model simulates how kidneys filter blood (normal water) and produce urine (yellow-colored water), using:
- Syringes as pumps
- Plastic bottles as kidneys
- Cardboard base and pipes to show flow of water
- A clear demo of input-output system like real kidney filtration
Materials Needed:
- 2 plastic bottles (representing kidneys)
- 2 large syringes (for pumping)
- Transparent pipes (IV tube or fish tank pipe)
- Cardboard sheet (base + background)
- Color paper (red, blue, yellow)
- Yellow food color (to show urine)
- Small plastic/glass cup (urinary bladder)
- Glue gun or Fevicol
- Scissors/cutter
- Paints (red, blue, white)
- Black marker
How to Make: Video Step-by-Step
1. Base and Background Setup
- Take a large cardboard sheet as your model base.
- Use another piece vertically behind it to create a background showing the human body outline with painted organs.
2. Make the Kidneys
- Cut two plastic bottles in half.
- Paint them red or wrap with red paper to represent kidneys.
- Attach them to the background vertically using hot glue.
3. Attach Syringes as Pumps
- Connect a syringe to each kidney bottle using pipe (at the top).
- These represent blood vessels entering the kidney.
- Connect another pipe from bottom of each bottle going into a transparent container (urinary bladder).
- Use yellow-colored water to show urine flowing when syringe is pressed.
4. Simulate Blood In & Urine Out
- Fill the syringes with clear water (blood).
- As you press the syringe, it enters the plastic bottle (kidney), and yellow water (urine) comes out through lower pipe into a small transparent plastic cup (urinary bladder).
- You can pre-mix yellow food color inside the bottle to simulate this.
5. Bladder & Urethra
- Use a small cup as the urinary bladder and fix a pipe from its base to simulate urethra.
6. Decoration & Labeling
- Use color paper and markers to label:
- Renal artery (red)
- Renal vein (blue)
- Ureter (yellow)
- Kidneys, Bladder, Urethra
- You can also make nephron diagram on the side using paper and explain filtration.
How It Works (Explain This in Exhibition)
- Syringe pumps clear water into kidney bottle (like blood entering kidney).
- Inside the kidney (bottle), water turns yellow to show waste (pre-mixed).
- Yellow water travels through pipe into bladder (cup).
- Demonstrates how kidneys:
- Filter waste
- Maintain water balance
- Remove excess salts