How does the digestive and immune system work?

The digestive system is a complicated system that has evolved over many years to be efficient. The mouth, small intestines, and large intestines have three main parts. Digestion starts in the mouth when food enters through the opening of your mouth from your nose or throat and then passes through your lips, teeth, and tongue. The saliva you produce will mix with some of the food on your teeth and start breaking down the protein in mucus membranes on your teeth for easier digestion. If you chew enough, you can also break down proteins in saliva, but this cannot happen if too much saliva is present. Once you swallow the food, it will move from your mouth to your oesophagus. This is a long tube that carries the food from the throat to the stomach. When swallowing, muscles in our throat will relax and push the food down with peristalsis (waves of muscle contractions that push things along). As the food travels through your body, it passes through many different organs, some of which break down other parts of the food. Dropping down into your stomach, you can feel that your heart rate goes up, and you might have butterflies in your gut because this is where digestion begins. The acid in your stomach breaks down some more proteins and softens up the food. The food then goes through the pyloric valve, which is only open when eating, and the food enters your small intestine. The food moves through this part of the digestive system and is broken down further. The small intestine has many different sections to hold water, more protein, Vitamins and minerals, enzymes that break down more protein, and more water to help with digestion. It also moves enzymes into the bloodstream to be used by antibodies that fight diseases such as cancer. The enzymes are essential in the digestion of food. The food that has been broken down in the small intestine gets pushed into the large intestine. This is where water and fibre are removed from the food and stored inside our bodies. The rest is solid waste that goes into your stool, which moves out of the body through your rectum and anus, and from there, it goes to the toilet or sewers where it will be disposed of. In general, you can see that we go through a lot with digestion to make sure nutrients are absorbed by our bodies and energy is produced for blood cells (haemoglobin). First off, what is the immune system? The Immune System is a complex network of cells and tissues that recognize foreign substances (antigens) such as viruses or bacteria. When antigens are identified, the body produces helper T-cells to fight off the abnormal cells in response to injury or infection. It is a highly complex process with many different stages. The first stage of the Immune System is the Phagocytosis stage. During this process, specific cells in our body(phagocytes) will engulf the microorganism or virus and trap it inside its enclosure. The second stage is called the sacrifice of the phagocyte. This stage occurs when a process occurs where foreign substance is taken back into the cell and broken down until it dies. The third stage is called Antibody production. This part of the process starts when your body sends signals to make antibodies from white blood cells (B-cells). These antibodies will either detect viruses or bacteria and send signals to other cells in your body. They can go after the antigens directly to attack the virus's spot. This is similar to an alert, causing your body to put up a fight against a harmful substance. The final stage of the immune system is called wound healing. During this process, damaged tissues lead to higher levels of b-cells being produced. These cells will help repair tissue damage and help other cells in your body fight off infection. Now that you know what the immune system is, I will explain how your body's reactions during hard work. When you first get sick with a cold, your body fights off the virus with its cell-based immune system. This is happening because when you get sick, your body sends signals to make antibodies from white blood cells (B-cells). These antibodies will either detect viruses or bacteria and send signals to other cells in your body. They can go after the antigens directly to attack the virus's spot. This is similar to an alert, causing your body to put up a fight against a harmful substance. The final stage of the immune system is called wound healing. During this process, damaged tissues lead to higher levels of b-cells being produced. These cells will help repair tissue damage and help other cells in your body fight off infection. The Immune System's role in fighting off a cold: When your body first gets sick with a cold, it sends out signals to make antibodies from white blood cells (B-cells). These antibodies will either detect viruses or bacteria and send signals to other cells in your body. They can go after the antigens directly to attack the virus's spot. This is similar to an alert, causing your body to put up a fight against a harmful substance.