Majestic Tree H
UKC Forum Member
Registered: Nov 2005
Location: New Market Va
Posts: 4670 |
Sorry they all Do Not have the Same Nose !! Some Hounds have Retained More of their org. Bloodhound Genetic Size..
But One thing is Ture Every Single Dog, Hound, Wolf ect have the Exact Same Genetic Olfactory Code .. Size is the Difference
Reference: http://www.pnas.org/content/93/20/10897.full.pdf
Nose Comes from mostly 2 Organs, One is the Area of the Olfactory Receptors in the Nasal Cavity the Other are the 2 Olfactory Blubs Located in the Brain ..
The Difference is the Overall Size and Mass of the Receptors and the Size of the Process of the Olfactory Bulbs .
Quote:
Number of human olfactory receptor cells = 12 million (Shier, D., Butler, J. and Lewis, R. Hole's Human Anatomy & Physiology, Boston: McGraw Hill, 2004)
Number of rabbit olfactory receptor cells = 100 million
Number of dog olfactory receptor cells = 1 billion
Number of bloodhound olfactory receptor cells = 4 billion (Shier, D., Butler, J. and Lewis, R. Hole's Human Anatomy & Physiology, Boston: McGraw Hill, 2004)
Surface area of olfactory epithelium (contains olfactory receptor cells) in humans = 10 cm2 (Bear, M.F., Connors, B.W. and Pradiso, M.A., Neuroscience: Exploring the Brain, 2nd edition, Baltimore: Lippincott Williams and Wilkins, 2001, p. 269)
Surface area of bloodhound olfactory epithelium = 59 in2 (Shier, D., Butler, J. and Lewis, R. Hole's Human Anatomy & Physiology, Boston: McGraw Hill, 2004)
Area of olfactory epithelium in some dogs = 170 cm2 (Bear, M.F., Connors, B.W. and Pradiso, M.A., Neuroscience: Exploring the Brain, 2nd edition, Baltimore: Lippincott Williams and Wilkins, 2001, p.
Reference: http://faculty.washington.edu/chudler/facts.html
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