Tears contain an enzyme called lysozyme. This enzyme is able to destroy the cell walls of certain bacteria, thereby protecting the body from infection by these organisims.
It can also protect the body from infection by constantly flowing, flushing out the eye and preventing entry of these organisims into the body.
White blood cells, or leukocytes, protect the body from disease by defending against infections and foreign invaders. They can recognize and destroy harmful substances in the body, helping to keep us healthy.
Antibodies are proteins manufactured by the body's immune system in response to an invasion by foreign substances such as bacteria or viruses. Antibodies help to identify and neutralize these harmful pathogens, protecting the body from disease.
Tears primarily serve to lubricate and protect the eyes, as well as to remove irritants. They are not considered a primary defense system, as they do not actively target pathogens or foreign substances in the body. However, tears do contain enzymes that can help fight certain types of bacteria.
The disease fighters in your body include white blood cells, antibodies, and the lymphatic system. These components work together to identify and neutralize pathogens such as bacteria, viruses, and other harmful invaders to protect your body from infections and diseases.
Respiratory tract
Antigens do not protect the body from disease. Antibodies protect the body from many diseases.
When we cry, tears can help remove toxins from our body, but the main purpose of tears is to lubricate and protect our eyes.
Vaginal Secretions techniquely do not protect the body from disease. For example, STD, women still get them. However it does protect the body from infections. The secretion is very acidic and kills most infections.
Immunity
If you knew what a disease was, you'd know that they are things that harm or kill people. Then you'd know why the body needs to protect against them.
A vaccines helps because they put some of the disease in your body then your body can get use to it so if you get that disease your body can easily fight it out of you!
The lacrimal system, which includes the lacrimal glands, produces tears. These tears help keep the eyes moist and protect them from external irritants.
Active vaccination produces antibodies against the particular organism. These antibodies kill the invading pathogen and protect the body against the disease.
The fluid that carries different substances and cells that help regulate body functions and protect the body against disease and infections is called blood.
tears
good bacteria
The body has a number of natural barriers, your skin, your eyelashes, mucus and even tears are all natural barriers to name but a few.