Report. The troposphere is the lowest layer of Earth's atmosphere and site of all weather on Earth. The troposphere is bonded on the top by a layer of air called the tropopause, which separates the troposphere from the stratosphere, and on bottom by the surface of the Earth.eport. The troposphere is the lowest layer of Earth's atmosphere and site of all weather on Earth. The troposphere is bonded on the top by a layer of air called the tropopause, which separates the troposphere from the stratosphere, and on bottom by the surface of the Earth.
The bile duct is a tube that transports bile from the liver to the small intestine. The gallbladder is attached to the bile duct by a small tube called the cystic duct. Bile is collected in the gallbladder between meals and empties into the bile duct through the cystic duct during a meal.
When food digestion is not taking place, bile backs up the cystic duct and enters the gallbladder to be stored. While in the gallbladder, bile is concentrated by the removal of water. The removal of water and electrolytes allows the gallbladder to concentrate bile and store more of it. When we eat and fats enter the first section of the small intestine, a hormone stimulates the gallbladder to contract and spurt out stored bile.