The image you sent me is a partial sentence that says “Why do humans have an immune system?”. The answer to this question is that the human body has an immune system to protect itself from infection. The immune system is a complex network of cells, tissues, and organs that work together to fight off germs and other foreign invaders.

The immune system has two main parts: the innate immune system and the adaptive immune system. The innate immune system is the first line of defense against infection. It works by identifying and destroying foreign invaders that the body has never encountered before. The adaptive immune system is the second line of defense. It learns to recognize and fight specific invaders that the body has been exposed to before.

The immune system is essential for human health. Without it, we would be susceptible to a wide variety of infections, many of which could be fatal.

Here are some specific examples of how the immune system works:

• The skin acts as a physical barrier to prevent germs from entering the body.
• The white blood cells in the blood and lymph system patrol the body for foreign invaders.
• The immune system produces antibodies, which are proteins that bind to and destroy specific germs.
• The immune system also produces memory cells, which remember the specific germs that the body has been exposed to before. This allows the immune system to fight off those germs more quickly and easily if they ever invade the body again.

The immune system is a complex and fascinating system that is essential for human health. It is constantly working to protect us from infection, and it is amazing how well it does its job.