Lymph nodes, masses of connective tissue housing lymphocytes, are located in the neck, groin, and axilla and have multiple afferent and one efferent lymph vessel.
Lymph nodes are connective tissue masses containing lymphocytes, with multiple afferent and one efferent lymph vessel, found in areas like the neck, groin, and axilla.
| Front | Number estimate of alveoli in the lungs |
|---|---|
| Back | Millions |
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