Lymphoid nodules Flashcards
Lymphoid nodules are _____tissues with densley packed _____
areolar tissue
Lymphocytes
Lymphoid nodules have what type of center and and lymphocytes
- Germinal center
-Dividing lymphocytes
Distribution of Lymphoid Nodules (name the places these can be found)
- Lymph nodes
- Spleen
- Respiratory tract (tonsils)
- Along digestive, urinary, and reproductive tracts
Mucosa-Associated Lymphoid Tissue (MALT) are lymphoid tissues associated with what system?
- Digestive system
Aggregated Lymphoid Nodules (Peyers Patches) are found?
Clustered deep to intestinal epithelial lining
The appendix (Vermiform Appendix) contains
a mass of fused lymphoid nodules
What are the five tonsils?
- In wall of pharynx
- Left and right palatine tonsils
- Pharyngeal tonsil (adenoid)
- Two lingual tonsils
What are the lymphoid organs and what are they separated by?
- Lymph nodes
- Thymus
- Spleen
- Are separated from surrounding tissues by a fibrous
connective tissue capsule
Why are Lymphoid tissues and lymph nodes distributed?
To monitor peripheral infections
Lymphoid tissues and lymph nodes respond before
before infections reach vital organs of
trunk
What do Lymph nodes of gut, trachea, lungs, and thoracic duct protect against?
Protect against pathogens in digestive and respiratory systems
Lymph Nodes (Glands) location and what they do
- Large lymph nodes at groin and base of neck
- Swell in response to inflammation
Lymph Node Function:
A filter (Purifies lymph before return to venous circulation)
* Removes: Debris, Pathogens, 99% of antigens
What is Lymphadenopathy and what does it indicate
- Chronic or excessive enlargement of lymph nodes
- May indicate infections, endocrine disorders, or cancer
