Do You See What I See?

In health class, we've been studying tobacco and other drugs. After spending the past 2 days learning about the dangers of tobacco and tar, students were asked to doctor up this image of Carl from Up to show ten negative effects of smoking.

But if you look closely at the section I've highlighted in the cloud, I think you'll understand why my co-worker and I were near tears with laughter today.

For the record, the student labeled this image as a lung.

Somebody give this kid an anatomy lesson. STAT!