Examlex
At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the rest room. The pitch of the sound that you hear, is
T-cells
A type of lymphocyte that plays a central role in cell-mediated immunity, distinguishing between self and non-self molecules.
Immune System
The body's defense mechanism against pathogens, comprising various cells, proteins, tissues, and organs.
Immune System
The body's defense mechanism against infectious organisms and other invaders through a combination of physical barriers, cells, and proteins.
Lymph Nodes
Small, bean-shaped structures that are part of the lymphatic system and function as filters for harmful substances.
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