When a half of a persons body is paralyzed it is known they have had a stroke
Amoebas use extensions of their cell membrane (called pseudopodia) to move, as well as, to engulf food. When the pseudopodium traps a bit of food, the cell membrane closes around the meal. This encasement forms a food vacuole. Hope this helps.
Blood cells more then any other factor notice water doesn't have any cells in it and it flows freely and quickly.
