Mouth, esophagus, stomach (pancreas and liver produce juices for digestion) small intestine(duodenum, jejunum and ileum), large intestine(ascending, transverse and descending colon), rectum and anus make up the digestive system.

Here is the formula to convert it: Temperature in Celsius= (5/9)*(temperature in Fahrenheit-32)

Because if it was on the upper side, more water would evaporate, causing wilting of the plant.

Transpiration( Evaporation from the aerial parts of a plant) causes a suction force which pulls the water upwards in the xylem vessels. This is known as the transpiration pull.