The largest river in the world is the Amazon River, 4,345 miles in length located in South America.
<span>Dora has been admitted to veterinary school and is excited to begin. She has an intense fear of dogs, probably stemming from when she was bitten by a dog many years ago. Dora knows that she must overcome this fear before she begins vet school. She finds a therapist who has her stand in a room with five dogs; the therapist remains in the room with her. After a few minutes of thinking that she would need to run out or start screaming, she realized that the dogs were actually not hurting her. After about an hour and a half, she noticed her anxiety level was substantially lower than it was before she entered the room. The technique seemed to be working. Dora's therapist was using the "COUNTERCONDiTIONING" technique known as "Stimulus Substitution".</span>
The respiratory system expels carbon dioxide
