Answer:
Respiration is a process in which energy is released due to the breakdown of glucose molecules with the addition of oxygen forming carbondioxode, water and energy in the form of Adenine tri phosphate (ATP). In respiration process, carbondioxide is released in the atmosphere and oxygen is used for breakdown of food. This carbondioxide is used by the plants in the process of photosynthesis and oxygen is released in the atmosphere which is again used by animals for respiration.
...to go from mouth to anus varies from 24 to 72 hours.
Because carnivores only eat meat. Or as the dictionary says, "carnivores feed on <em>flesh</em>" Flesh is meat. Not plants.
If a carnivore did eat plants <em>instead </em>of meat, then they'd be an herbivore.
If a carnivore ate plants <em>and </em>meat, they'd be an omnivore.
