Explore the intricate structures and functions of the human body, from cells to organ systems.
The immune system is your body's superhero squad, fighting off germs and keeping you safe from disease.
When a virus enters your body, the immune system quickly identifies it as a threat. White blood cells swarm in, and antibodies lock onto the invader to help destroy it.
Vaccines train your immune system to recognize germs, so you're ready if you ever meet them again. Healthy habits like washing hands and eating well give your immune system a boost.
You recover from a cold because your immune system fights off the virus.
Getting a vaccine helps your immune system recognize and defeat certain germs.
Your immune system is always on guard, protecting you from infections and illnesses.