An infection occurrs.
When pathogens enter the body, they begin to cause disease. Path=disease+ gen=to make (or generate).
Many pathogens outside the body can be killed with heat or chemicals. Inside the body, pathogens can sometimes be killed with medicine.
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for diseases to enter the body they must penetrate the skin
Your body is really a possible large dinner table for pathogens that are found everywhere. You need as many defenses as you have to fend them off.
Pathogens (bacteria and viruses that cause disease) can enter the body through various passages. Skin provides good protection against entry from pathogens so your vulnerable areas are your eyes, nose, mouth, ears and open wounds. Your (unwashed) hands can deliver pathogens to these areas. Airborne pathogens will enter through the mouth or nose as you breath them in. Pathogens in food will enter through your mouth into your digestive system. Pathogens can also enter through "vectors" directly into the blood stream - through mosquitos, fleas, ticks or contaminated needles, for example. It is important to remember that the body has many natural defenses to prevent pathogens entering the body, such as blood clotting at wounds, and enzymes in the eyes, nose and mouth that break down harmful bacteria.
what happens to your body when you eat to many fatty foods
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There are many types of immunoglobulin within the body. They are part of the immune response which the body activates when a pathogen/bacteria/virus enters the body. The body responds by initiating an innate response in which pathogens are phagocytosed (literally eating) by defense cells. The immunoglobulins help recognise these pathogens and tell the body that they are a foreign material so they can be destroyed.
The most obvious is the physical barrier - one's skin. The body also has enzymes such as lysozyme and defensins, which are secreted on the exterior, and kill bacteria. The acid in the stomach also kills most pathogens, and the lining of the intestines prevents many pathogens from entering the blood stream from the gut. In the blood, there are immune cells which mark and attack invading pathogens too. It's therefore astonishing that pathogens have evolved mechanisms to evade or counter all of these defences.
There are many channels are in females body. Your body is always busy moving and making things also your body has to make sure it has the right material cells and how many enter and exit the body.
In its many and varied forms it is called the Integument.