bacteria is a small living things that can be found a almost everywhere. They will live On the ground in oceans in the food that we eat and even in our bodies. They have been on the earth before there were any other organisms. Bacteria also small that we can see only with the help of microscope they have only one cell and very simple structures.
Bacteria has outer cell walls that protects the inside. A cell membrane is inside the wall. It prevents the harmful substances from getting in and out. Inside the membrane is soft, jelly like substance called the cytoplasm. It has chemicals that helps build the parts a cell and breakdown food. With in the nucleoid which contains DNA. Controlles a cell growth and other activities.
Bacteria appears in different shapes. Spherical bacteria are round or ball. Rod shaped bacteria lives in your intestine and form chains. Spiral shaped bacteria have a twisted form.
Bacteria absorb nutrients and remove waste through their cell walls. They reproduce by splitting them selves in the middle. The two new cells can then split into and so on. In a short time a bacteria can reproduce billions of times.
Some bacteria can get inside the human body, reproduce and cause an infection. These harmful bacteria are called pathogens. Our immune system is in charge of off these bacteria. However sometime we need vaccine to the fight of intruders. Vaccines are weak or dead forms of the bacteria itself. Such substance helps our body fight of bacteria in the future. Some examples of illness caused by bacterial infections tuberculosis or pneumonia.
The best way to protect yourself from bacteria is keep yourself clear and yourh hands. Because bacteria may be transported by ,we should cover our nose and mouth when we sneeze. Vitamins also strengthen immune system and fight off bacteria.
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