This is because water in tissue cells expands when it freezes, thus breaking cell walls and opening the inner cells to invasion once the tissue thaws.
(This; is; because water in tissue cells expands when it freezes) (the inner cells; to invasion; T:once; the tissue thaws) (water in tissue cells; expands; T:when it freezes) (it; freezes; )
This the inner cells water in tissue cells it
is to invasion expands freezes
because water in tissue cells expands when it freezes
T:once the tissue thaws
T:when it freezes