That depends on the parasite. Tciks for example stay on the outside of the host for a certain amount of time and, depending on the species, drop off after the blood meal. There are intestinal parasites, parasites of the liver, living in the bile ducts (fasciola hepatica), lungworms, worms in the lymph system....
endoparasites
No, cacti are not parasites. They don't live off other creatures.
Yes parasites do live on dead organic matter as it depends on the dead organism for food.
in fungi
Demodex folliculorum are intradermal parasites. They live in pores and hair follicles.
Are parasites that live on the surface of the host.
Parasites.
Are parasites that live on the surface of the host.
They are called parasites... they live off of their host
Parasitism .
ectoparasites
parasites are animals which live off their hosts so it's used to describe those who never work but live off benefits for example.