The esophagus constricts in a rolling motion, forcing foods and liquids towards your stomach. It is like squeezing a hose filled with water with your fingers and sliding your fingers up the hose. The muscle motion is called 'peristalsis'.
You don't, you can drink a can of beer backwards if you shake it and put a hole in the bottom but to drink water backwards would probably be drinking it upside down.
you can with a straw..
Try checking on properties of the video card. Most of cards support such feature.
water
they drink salt water because their body can filter and break down the salt water.
drink tons of water
they duck their head down and and get in the water swim and sip the water
Because they have to bend down to reach the water.
they don't alight to drink but they do drink. They only need a little.
No
Yes, any water that has been boiled is very safe to drink. It is important to let the water cool down; do not try to drink water that is still boiling.
sit down get as much rest as you can drink some water and/or an energy drink
dilute
Dilute