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tetanus
In the human body, the primary line of defence is the skin. The skin stops most of the microbes from entering the interiors of the body. If however, the pathogen is able to gain access into the body, the lymphatic system comes into play. The pathogen is eliminated before it begins to cause any more trouble.
your boogers
tetanus
saliva, mucus, hairs and Skin
It stops harmful particles of dust, bacteria etc. from entering into the body
Bacteria can make you sick by entering your body and "attacking" you. In response, your body heats up in attempt to "fry" the bacteria.
Most illnesses are caused by viruses or bacteria entering the body.
I'd assume your skin
tetanus
Most illnesses are caused by viruses or bacteria entering the body.
In the human body, the primary line of defence is the skin. The skin stops most of the microbes from entering the interiors of the body. If however, the pathogen is able to gain access into the body, the lymphatic system comes into play. The pathogen is eliminated before it begins to cause any more trouble.
So they can engulf the bacteria that is entering your body.
your boogers
tetanus
The skin is only a defense to stop bacteria from entering the body.
Diarrhea is caused by bacteria entering your body/ through your food. Which causes the body to try and get rid of the bacteria as quickly as possible which causes runny faeces or vomiting.