How do heartworms leave a dogs body?

Heartworms leave a dog's body primarily through the death and eventual breakdown of the adult worms, which can occur after treatment. Once the worms die, they are gradually absorbed by the dog's immune system or expelled through the dog's urine. In some cases, they may also be coughed up and swallowed. It's crucial to follow a veterinarian's guidance during the treatment process to manage any potential complications.