The choice to make PE determinations rests with each individual hospital (not with the state) and. is not dependent on whether the hospital (or the state) operates PE for other populations.
Relevance. Rating Newest Oldest. Best Answer: Trachea is the respiratory system supported by a rings of cartilage.. in animal, CO2 is considered as the gas released by the body cell and need to be exhaled out from the respitary system just like the human.. Source(s): Lollipop_mun Â· 8 years ago.
The thin-walled, cartilaginous tubes, the first branches (right and left) of the trachea, which carry air to the lungs; their walls consist of a pseudostratified columnar ciliated epithelium, a loose fibrous connective tissue submucosa with submucosal glands, O-shaped hyaline cartilage rings, and smooth muscle.