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digestion
Snot can be helpful to the body. It traps foreign particles and helps the body get them out. It can also be a problem.
This is a neutrophil.
They fight infections, and protect our body from foreign particles.
Antibodies are used to fight from foreign particles (pathogen generally) entering in the body of an individual.
Antibody
The body produces macrophages to try to break down foreign objects in the body. Splinters can also be safely removed with tweezers.
Insoluble particles can be removed from hot solution by filtration.
Antibodies are proteins released by a type of white blood cell called lymphocytes. They destroy hostile microbes in the body.
Immune system protects the body from any type of foreign antigen or pathogen which can cause disease. It also protect from particles to cause disease in human body.
Yes they can. The splinter will be un-sterile, and is a foreign object to the body. The body would start to attack it and eventually, pus would form if it were not removed.
Mucus secreted by goblet cells trap the foreign particles. Cilia push the particles out wards. This protects your lungs from damage by the foreign particles.