a comparison of the necklaces of sensory olfactory , and non-sensory nasal respiratory cilia of four vertebrate species ( frog , ox , rat and dog ) shows that the olfactory cilia have 7 +/- 1 ( mean +/- standard deviation ) strands in the three mammalian species and 6 +/- 1 strands in the frog ;
C0028429
nasal
C0037361
olfactory