Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The smoking chamber. For each cigarette smoke exposure session, 3 cigarettes were burnt in the compartment (B) and the smoke produced was continuously ventilated by 2 air pumps (A) to another compartment where the rats were placed (C). Each session lasted for 15 min, and the smoke was simultaneously ventilated out from the chamber into the air through a polyvinyl chloride tube (D)
