with your tears
Tears help prevent microbes from entering the body by providing a physical barrier and flushing away potential pathogens. They contain antimicrobial proteins, such as lysozyme, which can break down bacterial cell walls and neutralize harmful microorganisms. Additionally, tears maintain moisture on the surface of the eyes, which is crucial for overall eye health and protection against infection. This combination of mechanical and biochemical defenses helps keep the eyes and surrounding tissues free from harmful microbes.
Microbes do often get into cuts, but at some point the cut will get sealed by clotting blood, or even by hardening lymph if there isn't enough blood. You can also put on a dressing (such as a band-aid) to keep out microbes.
Increasing the amount of light entering the eyes causes the pupils to contract. Think about it, if someone shone a flashlight into your eyes, wouldn't you try to shield them?
This would be the iris.
no cells are assigned jobs of preventing the microbes from entering the body (is this accurate)but when they do enter the immune system fights them off. Some ways of keeping microbes out of the body are sneezing and coughing
They do not stop it but the mucus and motion of the cillia remove said microbes and dust should they get into the lungs.
White blood cells
whashing offten
one way is the nose ,the hair and the mucous in a person's noes prevents microbes from getting in by trapping them.
the diesease microbes stick to it before it enters the body!
Eat beans and fart regularily. Honestly , there's a constant exchange of microbes, bacteria, fluides and gasses between the insides and outsides of your body. A couple of microbes will not change a thing if your immune system is not compromised ...
poo head
Your immune system.
Skin prevents microbes from entering your body...
your iris contract to stop lights entering the pupil/preventing you from going blind.
Microbes do often get into cuts, but at some point the cut will get sealed by clotting blood, or even by hardening lymph if there isn't enough blood. You can also put on a dressing (such as a band-aid) to keep out microbes.
You can not. These organs have outlets to the outside and they can not be kept sterile. Your body does try to remove things by making mucous which more or less traps things like bacteria and even pollen and sweeps them away.