Bio U2 Vocab

Small glands located at the back of the nose. They help trap bacteria and viruses from getting into the body, protecting against infections like colds and sore throats.

• adeniods

• appendix

• bone marrow

• lymph nodes

A small, tube-shaped organ attached to the large intestine. It may help with immune functions, especially in early life, protecting against harmful bacteria in the gut.

• adeniods

• appendix

• bone marrow

• lymph nodes

The soft tissue inside bones where blood cells, including immune cells, are made. It produces white blood cells that protect against infections from bacteria, viruses, and fungi.

• adeniods

• appendix

• bone marrow

• lymph nodes

Small, bean-shaped structures found throughout the body that filter harmful substances and contain immune cells. They protect against infections by catching bacteria, viruses, and cancer cells.

• adeniods

• appendix

• bone marrow

• lymph nodes

Tubes that carry a clear fluid called lymph, which helps remove waste and harmful substances from tissues and carries white blood cells. They protect the body by transporting immune cells to sites of infection or injury.

• lymphatic vessels

• nasal cavity

• Peyer's patches

• skin

The inside of your nose, where air is filtered, warmed, and moistened. It helps trap germs in mucus, protecting against respiratory infections like the flu and common cold.

• lymphatic vessels

• nasal cavity

• Peyer's patches

• skin

Small areas of tissue in the intestines that monitor bacteria and prevent harmful organisms from making you sick. They protect against infections in the digestive system, like foodborne bacteria and viruses.

• lymphatic vessels

• nasal cavity

• Peyer's patches

• skin

The body’s largest organ, acting as a physical barrier to block germs from entering the body. It protects against bacteria, viruses, and other pathogens from getting inside and causing infections.

• lymphatic vessels

• nasal cavity

• Peyer's patches

• skin

An organ that filters blood, removing old or damaged blood cells, and helps produce immune cells. It protects against blood-borne infections, such as those caused by bacteria and parasites.

• spleen

• thymus

• tonsils

A small organ in the chest where T-cells, a type of immune cell, mature and learn to attack harmful invaders. It protects against viruses, bacteria, and even cancer cells by training the body's immune system.

• spleen

• thymus

• tonsils