The Miracle Of The Immune System

Protection in Respiration

One of the courses our enemies take to enter our body is the respiratory tract. Hundreds of varied microbes, which are present in the air we inhale, try to gain entry to the body through these passages. However, they are unaware of the barrier set up against them in the nose. 

A special secretion in the nasal mucous retains and sweeps out about 80-90% of the micro-organisms that gain entry to the respiratory system directly or through dust particles or other substances. 

In addition, the tiny hairlike structures (cilia) on the surface of the cells of the respiratory tract beat upward, causing a current that carries foreign particles to the throat where they are swallowed and disposed of by acid in the stomach. The coughing reflex and sneezing facilitate this function. 

The microbes that are able to surmount these barriers and reach the alveoli (lung, bronchus and gingiva) will be ingested by phagocytes. After this phase, phagocytes become mobile and drift upwards with the microbes they have ingested to be finally discharged from the body in different ways.

Each time you breathe, as you are doing now, a war is fought at the border gates of your body of which you are completely unaware. The guards at these border gates fight with the enemy to the death to protect your health. 
 

Protection in the Digestive System

Another vehicle by which microbes gain entry to our body is our food. However, the guards of our body, which are aware of this method used by the microbes, await them in the region where the food finally ends up, which is the stomach. They also have a surprise for the arriving microbes, which is the gastric acid. This acid is quite an unpleasant surprise for the microbes which have overcome all obstacles and reached the stomach. The majority, if not all, of the microbes are defeated by this acid. 

Some microbes may overcome this obstacle because they have not made enough contact with the gastric acid, or they have showed resistance. However, these microbes are again subjected to further conflicts with other guards situated on their way. Now, another surprise is at hand for them: the digestive enzymes produced in the small intestine. This time, they cannot get away as easily. 

As we have seen, the human body has specially created guards, which protect the human body in every phase of the microbes' assaults. 

There are now some important questions raised by this examination.

Who established that microbes living outside would try to penetrate our body through foods, which route the food would follow, how microbes would be destroyed in their final destination, where they would go if they overcame this obstacle, and how in that case they should be exposed to stronger measures? Is it the body cells, which have never been out of the body, and therefore, have no chance of examining the chemical make-up of the microbes outside, and which, moreover, have not received any training in chemistry?

Definitely not. Only God, Who created both the external world, and the food in this world, and the body that needs these foods, and the system to digest these foods, is able to create such a defence system.