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Sight or vision is the ability of the brain and eye to detect electromagnetic waves within the visible range which is why people see interpreting the image as 'sight.' There is disagreement as to whether this constitutes one, two or three senses.
Hearing or audition is the sense of sound perception.
Taste or gustation is one of the two main 'chemical' senses. There are at least four types of tastes that 'buds' on the tongue detect, and hence there are anatomists who argue that these constitute five or more different senses, given that each receptor conveys information to a slightly different region of the brain. The inability to taste is called ageusia.
Smell or olfaction is the other 'chemical' sense. Unlike taste, there are hundreds of olfactory receptors, each binding to a particular molecular feature.