Kidneys are a filter system. The main job of the kidneys is to remove waste from the blood and return the cleaned blood back to the body. Each minute about one litre of blood ï­ one-fifth of all the blood pumped by the heart - enters the kidneys through the renal arteries.
The volume of helium in the balloon has been estimated as being able to lift a total load, including the balloon material and the structure beneath it, of 65 pounds (29 kg) at sea level and 48 pounds (22 kg) at 8,000 feet (2,400 m).
Yeast Balloons Your Activity Inflate a balloon using yeast Materials Glass or Plastic Water Bottle Sugar One large balloon 1-tsp measuring spoon Active Dry Yeast (4-oz jar) Funnel Create 1. Fill the bottle about 1/3 full with warm water. 2. Add about 3 tsp of sugar (the exact amount is not important) using a funnel. 3.