Here's a breakdown:
* Lymph Nodes: These small, bean-shaped organs filter lymph fluid, a clear fluid that circulates throughout the body and carries white blood cells that fight infection. The lymph nodes in the armpit, along with those in the neck and groin, are responsible for filtering lymph from the arms, chest, and upper back.
* Protection: The armpit provides a protected space for the lymph nodes, shielding them from external injury and infection.
* Sweat Glands: The armpit also contains sweat glands, which help regulate body temperature and release pheromones.
However, it's important to note that the armpit itself doesn't have a single, primary function. It's a complex area with various components that contribute to overall body health and function.
