Lymphoid Tissue I (Non-encapsulated) Flashcards
Primary Nodule:
- More infrequent than secondary nodules
- Consists of only small lymphocytes
- Prenatal
- Don’t possess a germinal center
Secondary Nodular
- More frequent
- Possesses a germinal center
- Germinal center posses cluster of lymphoblasts
Left - Secondary lymph nodule
Right - Primary lymph nodule
Partially encapsulated
A: Pharyngeal tonsil (Adenoids)
B: Palatine tonsil
C: Lingual tonsils
Pharyngeal tonsil
Psudostratified columnar ciliated epithelium
Posses germinal center
No crypts
A: Pseudostratified columnar ciliated epithelium
B: Germinal center
Palatine tonsil:
- Stratified squamous epithelium
- Thick partial tissue capsule
- Germinal centers
- Multiple crypts
A:Stratified squamous
B: Partial capsule
C: Germinal centers
D: Crypts
Lingual tonsil
- Stratified squamous
- No well defined capsule
- Posses germinal centers
- One crypt per tonsil
A: Stratified squamous epithelium
B: One crypt per tonsil
Palatine Tonsil
Lingual tonsil
Pharyngeal tonsil
GALT
Small intestine
A: illeum
B: Villi
C: Lymphoid tissue
D: Peyer’s patches
Simple columnar with goblet cells
GALT
Vermiform appendix
No villi
Crypts
Simple columnar with goblet cells