Many tiny hair-like cilia protrude from the olfactory receptor cell's dendrite into the mucus covering the surface of the olfactory epithelium. The surface of these cilia is covered with olfactory receptors, a type of G protein-coupled receptor.
Respiration -10 to 30. The normal respiratory rate for dogs is 16 to 20 breaths per minute. The normal heartrate is 70 to 160 bpm. Large dogs tend to have slower heart rates so your dog should be in the 70 to 120 bpm range. This varies according to the cardiovascular fitness of the dog, too.
The average respiratory rate for canines is 24 breaths per minute, but typically a dog's respiratory rate will be between 10 and 30 breaths per minute. This number may be affected by a few factors such as: 1  The age of the dog, as puppies may have a faster respiratory rate (between 15 and 35 breaths per minute, during the first few weeks of life) 2  The breed, as some dogs may have a different anatomy of the nose that will make them breathe faster or slower.