Ants

You don't.

Killing things in the human body is for killing cancer growths, parasites like disease germs, worms, fungi and so on. Ants in a human body would either have been swallowed, in which case they usually would be dead already, or would die soon, or they would be in a dead limb or wound or the like and not of any medical importance.

If you are talking of ants, say a colony of fire ants, that have attacked a human and are all over the body and clothes, then remove the clothes where necessary, and scrape the skin where the ants are with the back of a knife or some similar and harmless scraper; it is faster than picking them off. If there still are lots of ants around while you are dealing with them, then while you work get the victim into water to stop the ants (with plenty of added detergent if possible, but don't waste time getting the detergent). Then deal with any stings or bites.

Possibly you are thinking of stories like those of witch doctors or shamans who let ants in or out of human bodies, but one gets lots of nonsensical stories of that kind.

The real stories are far more interesting.

He probably wouldn't die if you took him to the vet IMMEDIATELY.

Bubbles!

C(:

Every living, breeding creature has inherited traits, whether that creature is a virus, a Redwood, or a whale. You won't find a redwood tree making seeds from which ants or cows or people or or even grass or oaks will grow; their seeds contain nucleic acids (mostly DNA) that pass on the traits that make them redwoods, and only redwoods. The traits of every part of the plant, meaning the way all of them work, its juices, its wood, its skins, its roots, the shapes of its cells, all those traits depend on the codes in its DNA that its parents gave it. The traits are the way those parts work, and all those ways come its parents; we say that it inherited the traits from the parents. If it had not inherited traits it simply would not have been a redwood at all.

In the same way any ant, and certainly any fire ant, comes from a single egg cell. That egg cell contains the DNA in which the information is stored that the baby ant inherits, meaning that it gets that information for all its traits from its parent or parents. That information controls the way its body builds as it grows, forming the rest of its cells, and fixing the way they fit together and work together to make an ant and give it the habits of an ant.

Without that information, that building plan, nothing about the young fire ant would even have been a fire ant at all. A fire ant doesn't just happen, it needs the traits written into the DNA and other parts that the parents passed on, just as a car doesn't happen; it needs the steel and plastic and the parts and the plans that the factory uses to make it. Otherwise it might as well have been a rock or a junk pile.

In practice it is more of a web than a chain, because there are many other kinds of animals and plants that would play roles, and there are many kinds of ants, lizards and hawks that do not eat each other. Still, loosely speaking, a few kinds of lizards frequently eat ants, and others, such as the horned lizards (Phrynosoma species) and the thorny devil (Moloch horridus) hardly eat anything else. Many kinds of ants will eat in turn eat s lizard in turn, if they find a dead or very small lizard. Some kinds of hawks will eat some kinds of lizards (though some, such as the snail kite, Rostrhamus sociabilis, do not). Some kinds of lizards, such as some large monitor lizards will eat any kind of hawk they can catch, and practically any other kind of bird too. Some other lizards eat carrion if they find any, and so they will eat dead hawks. So do many kinds of ants.

And that does not even count the thousands of other species that play their parts.