Immune response

Our bodies have a special way to stay safe. This is called the immune response. It helps us fight off tiny things that can make us sick, like viruses and bacteria.

There are two main parts to this system. The first part is called the innate system. It works right away to stop germs. It includes our skin and the lining in our nose and throat. Special cells like neutrophils and macrophages help fight off invaders too.

The second part is the adaptive system. It is slower but very clever. It remembers germs it has fought before. If the same germ tries to make us sick again, the adaptive system can act faster. This is why vaccines are helpful. They teach our body to recognize germs without making us sick.

Our immune response keeps us healthy by using different cells and tools. It works hard to protect us every day!