Most pathogens enter and leave the body through the digestive or respiratory tracts. Polio, dysentery, and typhoid are examples of diseases contracted by ingestion of contaminated foods or fluids. Organisms present in the saliva or nasal mucus are spread by airborne or droplet infection; fine droplets or dried particles are inhaled by others when the affected individual talks, coughs, or sneezes. Diseases such as measles, mumps, and tuberculosis are passed on in this way.
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Pathogens can enter the body through various routes such as inhalation, ingestion, direct contact with broken skin, or through insect bites. Once inside, they can multiply and cause infection by evading the body's immune defenses and damaging tissues.
droplet
The two mechanical barriers to infection are the skin, which acts as a physical barrier that prevents pathogens from entering the body, and mucous membranes, which line the respiratory, digestive, and urinary tracts and trap pathogens before they can enter the body.
they enter the bloodstream. when you get cut for example, the capillaries are broken, so there, the pathogens enter.
Infection refers to the invasion and multiplication of pathogens within the body, often leading to tissue damage. Inflammation is one of the body's responses to infection, characterized by redness, swelling, heat, and pain at the site of infection.
the immunes system i found out of my teacher
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The term for acquiring an infection through mucosal tissue is mucosal transmission. This occurs when pathogens enter the body through the mucous membranes lining the respiratory, gastrointestinal, or genitourinary tracts.
The main function of white blood cells (also commonly referred to as leucocytes) is to defend against foreign invading pathogens that may enter the body. They do this as they are phagocytes, in that they engulf pathogens and destroy them. Therefore, the function of a white blood cell is to defend the body against infection.
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Pathogens can enter the body through the eyes, nose, or mouth. These openings provide direct pathways for pathogens such as bacteria or viruses to infect the respiratory or digestive systems. It's important to practice good hygiene, like washing hands and avoiding touching the face, to reduce the risk of infection.