heart working model – biology – human – simple – using plastic bottle and balloon

In this article written on how to make the heart working model – biology – human – simple – using plastic bottle and balloon | howtofunda

Creating a heart working model using a plastic bottle, balloon, and straw can be an engaging way to demonstrate the basic functioning of the heart as a pump.

Here’s a step-by-step guide to making a simple heart model:

Materials you will need:

  • Plastic bottle (empty and clean)
  • Balloon
  • Drinking straw
  • Scissors
  • Tape
  • Water

Step-by-step instructions:

  1. Prepare the plastic bottle:
    • Make sure the plastic bottle is clean and dry. Remove any labels or stickers from the bottle.
  2. Insert the balloon into the chamber:
    • Stretch the opening of the balloon over the open end of the plastic bottle, securing it firmly in place. The balloon represents the heart’s muscular walls (myocardium) and will function as the pump.
  3. Create the “heart valves”:
    • Cut two small slits on the sides of the plastic bottle (above the balloon) and insert the ends of a drinking straw into each slit to create “valves.” The straw ends should be inside the bottle.
  4. Seal the “heart valves”:
    • Use tape to secure the straws in place and to seal any gaps around the slits, ensuring airtight connections.
  5. Fill the heart model with water:
    • With the balloon in place and the “valves” sealed, fill the plastic bottle with water. Make sure not to overfill it, leaving some space for the water to move.
  6. Demonstrate the heart’s pumping action:
    • Hold the heart model with one hand and gently squeeze the sides of the bottle with your other hand to mimic the heart’s contraction (systole). As you do this, observe how the balloon (representing the myocardium) pushes the water (blood) out through one straw and into the other straw (representing the circulation of blood through the heart).
  7. Observe the heart’s relaxation (diastole):
    • Release your grip on the bottle, allowing it to return to its original shape. As the bottle expands, it creates a vacuum effect that pulls water back into the chamber through the other straw.

By following these steps, you’ll have a simple heart working model that demonstrates the basic pumping action of the heart.

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