I have been asked a question which is realy bugging me, say if you stood on your head could you drink a glass of water through a straw, I would think it will not be possible, would appreciate any responces, thanks.
I think the problem would be more of a case of gravity; would the water be able to pass from your mouth to your stomach, working away from gravitational pull?
err squarebear.....WTF are you on about gravity has never been necessary to eat/drink, upside down you are working against gravity but still able to drink quite easily.
It doesn't matter if you eat or drink upside down - i remember this from science too, we watched it in a video (i say that like it was ages ago, it was actually about 4 years ago!)
The muscles in your oesophogus (can't be bothered looking up the correct spelling) pull the food up, I'm sure? Something along those lines.
You don't have to rely on our say-so to believe this. The cost of reconstructing the experiment should be well within your pittance of pocketmoney so why not try it for yourself? One straw, one glass of water, one body (yours).
Many years ago (well, about 23), the forfeit for Prick of the Day in my rugby club was to drink a quart (two pints) of beer ( from a special glass) while standing on your head.
One beast managed it in 17 seconds, so swallowing against gravity was not a problem, per se.
This was on the radio few days ago, apparently humans can drink through a straw up-side-down but canarys can't...random I know...something to do with gravity.