The bacteria or any foreign particel to enter the human body have to cross many barriers and they are classified as line of defence
Skin is the first line of defence and it work as physical barrier for all the microbes and particle. Skin has many secreatory products which kill the bacteria also.
Then there comes some internal barriers like mouth which secreate cell disolving enzymes, eyes which secreat lacrymal secreations which act on bacteria to destroy it in stomach low pH and many bile salts are responsible for the prevention of bacteria to attack. These all comes under non-specific defence mechanism
Then there comes second and third i.e. last line of defence which is cell midiated and are done my immune organs and tissue like lymphnodes, spleen etc. and the cell are basophill eosinophill, neutrophill, Natural killer cells granulocytes like macrophages etc.
The bacteria or any foreign particel to enter the human body have to cross many barriers and they are classified as line of defence
Skin is the first line of defence and it work as physical barrier for all the microbes and particle. Skin has many secreatory products which kill the bacteria also.
Then there comes some internal barriers like mouth which secreate cell disolving enzymes, eyes which secreat lacrymal secreations which act on bacteria to destroy it in stomach low pH and many bile salts are responsible for the prevention of bacteria to attack. These all comes under non-specific defence mechanism
Then there comes second and third i.e. last line of defence which is cell midiated and are done my immune organs and tissue like lymphnodes, spleen etc. and the cell are basophill eosinophill, neutrophill, Natural killer cells granulocytes like macrophages etc.
http://wiki.answers.com/What_barriers_must_bacteria_overcome_when_entering_the_body#ixzz17S0bin58
The barriers that bacteria has to overcome to enter the body is the skin barrier, the oral-cavity barrier, the digestive track barrier, and the respiratory tract barrier. The barriers help keep the bad bacteria out the body or flush it to an area that it will be ejected from body.
The bacteria has to overcome many barriers including:
The skin-it is a layer of protection to prevent things like bacteria coming into the body.
The mouth-The mouth kills bacteria. It will secreate cell disolving enzymes.
The antibodies-the antibodies will fight bacteria and microbes in the body as they help the white blood cell.
It has to overcome the antibodies that kill it
The stratum corneum is what helps prevent bacteria fro coming in the body. This is what keeps people from been sick all the time.
Antibodies
So they can engulf the bacteria that is entering your body.
No, some bacteria is good for your body. For example, when you eat dairy products such as yogurt, it contains great amounts of bacteria that is good for your body. Not all bacteria in your body causes disease.
One way the body keeps microbes from entering the body is by the skin, the skin is considered a barrier. That is why when a person gets an injury that breaks the skin the first layer of defence is considered broken. Also the hair and mucous mucus in a persons nose prevent microbes from entering by trapping them . ^ Thats all a lie. This is not a lie at all. It is a very truthful and precise answer, I should know; I am a doctor!!
the white blood cells sorround the bacteria
the excretory system gets rid of all your body's waste, and prevents the pathogens from entering and exiting 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.
So they can engulf the bacteria that is entering your body.
It stops harmful particles of dust, bacteria etc. from entering into the body
your boogers
tetanus
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.
The skin is only a defense to stop bacteria from entering the body.
Tetanus is caused by a common bacteria found in the soil. It can be contracted by the bacteria entering the body from a wound. Such as stepping on a rusty nail.