#6 So we are what we eat afterall?

#5 Bullshit. I know tons of people who CAN tickle themselves, me included; we just CHOOSE not to.

#1 Your digestive system also has it's own blood system, from your oesophagus to your rectum.

#7- IIRC, the blind spot is caused by the bump where the optic nerve connects to the retina. it's not really all that large of spot, and even a single eye by it's lonesome (plus the associated visual cortex) can obviously correct much of the fault on its own. try it and see.

#9 bullshit as well, that silly test proves nothing else except that the nervous vibrations are sooner than the actual movement of the body - big woohoo, really. kids in kindergarten are smarter than that