The Immune System.
The adaptive immune system was developed in higher vertebrates to combat pathogens and antigens. These can include viruses, bacteria, and anything else that can cause the immune system to launch an immune response.
digestive and circulatory
This organelle is called the lysosome. Filled with digestive enzymes.
The immune system needs to destroy the pathogens. Other wise the pathogens will multiply in the body of host. The pathogens will multiply by geometrical proportion. With in very short time the pathogens will occupy the whole body. You can no longer survive in that case.
Oxygen
They have enzymes in them to kill pathogens
The stomach (part of the digestive system) has a low pH (acidic), which kills pathogens.
The adaptive immune system was developed in higher vertebrates to combat pathogens and antigens. These can include viruses, bacteria, and anything else that can cause the immune system to launch an immune response.
The body system that is responsible for fighting pathogens is the lymphatic system. Another important contributor to this mechanism is the immune system, though it is not a system, per se, in terms of a system of the body, because it is made up of a combination of different systems and works to combat foreign invaders, like pathogens and microbes.
The molecules on pathogens that enable the immune system to distinguish one kind of pathogen from another are called antigens. Antibodies destroy pathogens by binding to the antigens on the pathogen.
Anything, in the digestive system or in other systems, that speed up reactions are called enzymes.
digestive and circulatory
Microbes is a more global term for small living creatures. Some have negative impact on our system when they intrude our body, called pathogens. They interfere with reactions in our body.
immune system
This organelle is called the lysosome. Filled with digestive enzymes.
The immune system
Oxygen