Lymph nodes act as physical filters that trap bacteria before they reach the heart
Lymph nodes serve as the body's physical security checkpoints, trapping and destroying bacteria in a complex filtration system before they can enter the heart.
The human body contains between 600 and 800 lymph nodes, which filter one to two liters of lymphatic fluid every day. As fluid enters a node through the subcapsular sinus, it passes through 'germinal centers' where B-cells undergo rapid mutation to create the perfect antibody for any trapped pathogens.
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