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.
Expert: JamesStone replied 4 years ago. The trachea is reinforced with cartilage rings in order to keep the airway open. These rings reinforce the anterior and lateral sides, but are actually C shaped as opposed to complete rings which allows the trachea to constrict somewhat when swallowing food.xpert: JamesStone replied 4 years ago. The trachea is reinforced with cartilage rings in order to keep the airway open. These rings reinforce the anterior and lateral sides, but are actually C shaped as opposed to complete rings which allows the trachea to constrict somewhat when swallowing food.