A foreign material that invades the body is called an antigen. Examples of antigens are bacteria, dust particles, viruses and toxins.
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They do. As soon as sperm enter the female's body, they are under attack. That's why only a few out of several million sperm actually make it to the egg.
cell membrane
White blood cells play a critical role in the body's immune system by helping to combat infections and foreign invaders, such as bacteria and viruses. They work to identify and destroy pathogens to keep the body healthy and functioning properly.
Foreign materials can enter the body through ingestion, inhalation, or injection. This can happen through consuming contaminated food or water, breathing in airborne particles or pollutants, or through broken skin that allows entry of foreign substances.
Raw materials and harmful wastes enter and exit the cells in your body by blood, the red blood carry oxygen from lungs to the body cells.
it somehow prevents foreign materials to get through the body.
Nostrils are mainly what the human race breathes out of, but, other than that purpose, they also help protect it by: Having hairs: the hairs on the inside of your nose (Yes, everybody has them) trap foreign materials. Mucus: the mucus on the inside of your nose also traps foreign materials. This is also why we get allergies. Foreign materials enter and the body's response is to create mucus along the nostrils to protect your respiratory tract further.
A foreign body is called any intruding object originally originated from outside the own body. They can be swallowed or get into the own body from the rectum. Another possibility to enter would be by airways. Some examples of foreign bodies include coins or batteries.
A foreign molecule is a substance that is not naturally produced or recognized by the body. When foreign molecules enter the body, the immune system may identify them as threats and initiate an immune response to protect the body from potential harm.
Lysosomes are cell organelles that contain hydrolase enzyme that break down any waste materials or foreign materials that enter a living cell. So it is important to protect the cell from foreign elements including microorganisms like virus, bacteria, protozoa, fungi, etc. that could cause diseases in the living body and kill cells.
the pathways by which hazardous materials may enter the body
Why and how business enter to survive in foreign market
white blood cells
They defend the body against both infectious disease and foreign materials.
White blood cells defend the body against both infectious diseases and foreign materials.