How Many Taste Buds Are On the Human Tongue?

A person's tongue has about 10,000 taste buds - they last about 10 days
each and are constantly being replaced.

There are approximately 10,000 taste buds on the human tongue. They are
located in the bumps and ridges, known as papillae, on the tongue. Each
taste bud contains taste cells, which have receptors that differentiate
between chemicals and send messages to the brain to respond to the taste.
The lifespan of a taste bud is about 10 days, after which it is replaced
with a new one. Scientists believe that humans' taste buds can taste five
distinct flavors: sweet, sour, salty, bitter and umami, a Japanese word
referring to the savory taste that occurs when the chemical glutamate
breaks down.
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