The human immune system is like a bodyguard for our health. It always watches out for anything that might harm us. Let’s break it down into easier parts:

1. First Line of Defense:

   • Barriers: Our skin and mucous membranes are like shields. They keep germs and bad stuff from entering our bodies.

2. Innate Immunity:

   • If germs get past our barriers, our innate immunity comes into play. This part includes white blood cells, like phagocytes. These cells chase and eat up harmful bacteria.

3. Adaptive Immunity:

   • This is the really cool part! Our body can remember past infections. Special cells called T and B cells help with this. They can recognize old germs and respond faster if the same ones show up again.

4. Antibodies:

   • B cells make something called antibodies. These are special proteins that target specific germs, neutralizing them and telling the body to destroy them.

In short, the immune system is a complex network that helps us stay healthy. It adapts and responds to stop diseases from taking hold.