Lymph nodes are small bean-shaped bodies found in groups of what size along the course of the lymph vessels?

Lymph nodes are small, bean-shaped structures that play a crucial role in the immune system by filtering lymph and trapping pathogens and foreign substances. They are generally found in groups along the lymphatic vessels, with their arrangement typically consisting of clusters ranging from two to fifteen nodes. This clustering allows for efficient filtration and immune response coordination.

The specified range of two to fifteen nodes accurately reflects the anatomical arrangement in the body, where lymph nodes are often located in specific areas, such as the neck, armpits, and groin. The presence of this number of lymph nodes in groups helps ensure optimal immune system functionality, as they can collectively respond to infections or issues in the lymphatic fluid they filter.