Lymph nodes are small (0.1-2.5 cm long) encapsulated structures that interrupt the course of lymphatic vessels and contain elements of the body's defense system, such as clusters of lymphocytes and macrophages.
Lymphocytes and macrophages act as elaborate filters that trap and phagocytose particulate matter in the lymph that percolates through them. In addition, they detect and defend against foreign antigens that are also carried in the lymph.
Category: Medical & Health Sciences
Share it: Cite
Previous: ← Lymphatic vessels
Next: Nervous Systems →
More from this Section
- Chest Cavity
The chest cavity is bounded by the chest wall and below by the diaphragm. ...
The thymus is a flattened, bilobed structure lying between the sternum and the pericardium ...
The esophagus is a tubular structure about 10 in. (25 cm) long that is continuous above ...
- Asperger’s Syndrome
Asperger’s Syndrome is a Pervasive Developmental Disorder (PDD) characterized by normal ...
Dementia is a condition of declining mental abilities, especially memory. Individuals ...