This question seems to be asking about how lymph forms, which then flows to lymph nodes. Lymph nodes don't "start"; they are structures that filter lymph. Lymph formation is how the lymphatic system begins its process.
Here's a breakdown based on the provided reference:
Lymph formation begins with the collection of interstitial fluid through tiny lymph capillaries distributed throughout the body.
- Interstitial Fluid: This fluid surrounds cells within tissues.
- Lymph Capillaries: These are small vessels that collect the interstitial fluid. This fluid, once inside the lymph capillaries, is then called lymph.
- Lymph Vessels: The lymph is transported through these vessels.
- Lymph Nodes: Lymph nodes are structures located along the lymph vessels that filter and clean the lymph.
In essence, the lymphatic system starts when interstitial fluid enters the lymph capillaries, forming lymph, which then travels to lymph nodes for filtering.
