Cactus have fibrous thread like roots so they can absorb water even in the smallest quantity.
Yes, the barrel cactus has roots.
Yes, a saguaro cactus has roots.
A Cactus has roots to absorb as much water as possible when it rain also to support the Cactus when it bad weather such as wind.
No
Barrel cactus have fibrous roots
Because the roots of the saguaro cactus are just below the surface.
you have to look at the cactus small big
A cactus has roots just as do other plants. These roots absorb water from the soil when it is available and store water in their tissues for ties of drought.
Cactus plants use their stems for storage. So that's where starches are stored. In fact, stems are where a cactus plant stores everything. Other, non cactus plants may use their roots for storage. But cactus roots are much too fibrous and shallow.
Some cacti have shallow roots. Other cacti have long tap roots.
It has fibre root.
one thing you can do is throw bowling water to the roots (bottom of the cactus) another thing you can do is throw some dirty car oil to the rootsDig it out from the roots.