<span>A spider is small enough that its weight can be supported by surface tension, the relatively weak forces that hold water molecules together. </span>Water molecules "bond"<span> to other water molecules around them in all directions, so they tend to stick more strongly to their neighbors, forming a film-like layer across the surface</span>
Which is...when tumors cause blood vessels from the circulatory system to grow into the tumor ,preventing oxygen and nutrients from travelling to other cells
