How does osmosis apply to the working within a normal human body?

Answer 1

Many cellular processes are dependent upon SPECIFIC cytosolic and extracellular fluid concentrations of particles and ions (we call this osmolarity). In order for these concentrations to remain in tact, often water must pass freely through the cell membranes to help maintain such concentrations. The water actually flows through water channels called aquaporins, it's not that the cell membrane itself is permeable to water per se.

Answer 2

to expand on coolben92's answer, salt kills a slug because its cells are trying to balance the concentration of salt (which it absorbs through its skin) in its circulatory system and in its cells. causing its cells to expell most of their water thereby killing them the cells are also absorbing the salt but it is a slow process. This same is true in humans but humans have a much better control over what actually gets into our blood. but our cells use osmosis to get o2 from red blood cells as well as nutrients from the blood, just not through uncontrolled osmosis as you see in slugs. we have a much more advanced physiology.

Answer 3

cuz osmosis moves fomr hishe cnocentraation to low concentration............ a snail/snug dies because of salt becuse the water in its body is moving to the outside......... it dies because of osmosis