Immune
This destroys infected body cells
Killer T-Cells
This dome-shaped muscle under your lungs moves up and down to help you breathe in and out.
What is the diaphragm?
Digestion begins in this part of the body, where teeth and saliva start breaking down food.
What is the mouth?
This muscular organ pumps blood all around your body
What is the heart?
This type of muscle, like your biceps and triceps, is the only kind you can control on purpose.
What is skeletal muscle?
These tiny white blood cells are the first to rush to a cut or scrape to fight germs. They act like the body’s emergency squad.
What are neutrophils?
These two organs fill with air when you breathe and are the main parts of your respiratory system.
What are the lungs?
This long, stretchy tube moves food from your mouth to your stomach using a squeezing motion called peristalsis.
What is the esophagus?
These blood vessels carry oxygen-rich blood away from the heart to the rest of the body.
What are arteries?
This strong muscle helps you chew your food and is one of the most powerful muscles in the body.
What is the masseter?
This complex network of cells, tissues, and organs—including lymphocytes, the thymus, and the spleen—acts as the body’s defense force, identifying and neutralizing pathogens and foreign substances.
What is the immune system?
This tiny air sacs at the ends of the bronchioles are where oxygen moves into your blood and carbon dioxide moves out.
What are alveoli?
This J-shaped organ churns food and mixes it with acid to break it down into a thick liquid called chyme.
What is the stomach?
These tiny blood vessels connect arteries and veins, and are where oxygen and nutrients are delivered to your cells.
What are capillaries?
You don’t have to think about using this type of muscle—it works automatically, like in your stomach or intestines.
What is smooth muscle?
This organ, located in the upper chest, is where T cells mature before being released into the bloodstream.
What is the thymus?
This tube connects your nose and mouth to your lungs. It's also called your windpipe.
What is the trachea?
Most of your food’s nutrients are absorbed in this super-long part of your digestive system.
What is the small intestine?
This liquid tissue carries cells, nutrients, and oxygen and also helps fight infections.
What is blood?
Found only in the heart, this muscle type never gets tired and keeps pumping your whole life.
What is cardiac muscle?
These proteins, produced by plasma B cells, bind to specific antigens and tag pathogens for destruction.
What are antibodies?
Your brain automatically controls your breathing from this part, located at the base of your brainstem.
What is the medulla oblongata?
This organ helps digestion by making bile, which breaks down fats. It’s also the body’s chemical processing plant.
What is the liver?
This part of the heart separates the oxygen-rich blood from the oxygen-poor blood, keeping the flow organized.
What is the septum?
These stretchy, rope-like bands connect muscles to bones and help your body move.
What are tendons?