![[ETH/ETH - Systems Neuroscience/Images - ETH Systems Neuroscience/image74.png]] - Average number of human taste buds = 5000. - Number of human olfactory receptor cells = 40 Million. - Number of dog olfactory receptor cells = 1 Billion. (Different dog species have different number of olfactory receptor cells). **Sensitivity of Different Regions of the Tongue to Different Tastes** Most of the tongue is sensitive to all tastes. However, certain regions of the tongue are most sensitive to specific basic tastes. Any taste that we experience can be obtained as a combination of these four tastes (with the exception of fatty and Umami tastes). ![[ETH/ETH - Systems Neuroscience/Images - ETH Systems Neuroscience/image75.png]] The papillae contain the taste buds, which in turn contain many cells. Each of these cells has access to the surface of the mouth through a "taste pore", that's where the molecules contained in the saliva and what we eat bind to particular receptors which evoke the sense of taste.