Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow. Some live in or on other organisms including plants and animals including humans. There are approximately 10 times as many bacterial cells as human cells in the human body.
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It starts in the mouth. You start to chew in which the glands that produce saliva make it easier to send down the esophagus
Did you attach a picture? i don't see anything ????
The amount of waste in the water.