Lymphoid Images Flashcards
Identify
Lymph node
- Capsule: dense irregular connective tissue
- Cortex: sinuses and lymphatic nodules
- Medulla: dense lymphoid tissue and sinuses
Identify
- Capsule: dense irregular CT
- Subcapsular sinus: loose lymphoid tissue, has a few reticular cells and many lymphocytes within
- Cortex (just beneath capsule, consists of sinuses and lymphatic nodules)
Identify
Lymph Node
- Afferent lymphatic vessel (within capsule)
- Valve (control the flow of lymph through the node)
- Capsule
- Subcapsular sinus
Identify
Lymph node
- Cortical lymphatic nodules
- Subcapsular sinus
- Capsule
- Cortical lymphatic nodules
- Germinal center
- Cortex
Idenitfy
Lymph Node: high power of secondary lymphatic nodule
Germinal Center
Mantle: concentrically arranged small lymphocytes, surrounds germinal center
Identify
Dlt: dense lymphoid tissue (surrounds sinus)
Ms: medullary sinus (loose lymphoid tissue)
Reticular cells and lymphocytes within sinus
Identify
Lymph node
Efferent lymphatics: notice valves in most of these vessels
Identify
Lymph node
Post capillary venules with tall endothelium
Identify
Lymph node
Capsule
Subcapsular sinus
Cortex
Identify
Fx of HEV: cell adhesion molecules, play a role in lymphocyte recirculation
Identify
Perfused spleen
Capsule
Red pulp
White pulp
Trabeculum (contains a blood vessel)
Identify
Perfused spleen
White pulp
Red pulp contains (s) splenic sinuses and (c) splenic cords (between sinuses)
Identify
Perfused spleen
Red pulp (surrounds white pulp)
Lymphatic nodule
Germinal center
PALS (periarterial lymphatic sheath): have central arteries within, populated by T lymphocytes, irregulr shaped portion of white pulp
PALS + Nodules = white pulp
Identify
Perfused spleen
White pulp surrounded by red pulp
Central arteries within white pulp
Identify
Fetal thymus
Cortex and medulla of each lobule
Identify
Thymic lobule
Identify
Fetal thymus
Hassall’s corpuscle
Identify
Fetal thymus
Hassall’s corpuscles (one has been keratinized)
Identify
Adult thymus
Cortical areas (c)
Medullary areas (m)
2 Hassall’s corpuscles that have calcified
Surrounded by connective tissue
Identify
Tonsil (palatine - don’t need to know)
Dlt: dense lymphoid tissue - what tonsils are composed of
ln: lymphatic nodules - lie beneath epithelium
e: stratfied squamous epithelium
c: crypts - penetrate into the tonsil
Identify
Tonsil
Crypt (epithelial invagination)
Lymphatic nodules with germinal centers
Identify
(Optional)
Unperfused spleen
Red pulp with sinuses in the subcapsular region
Capsule around outside
Identify
(Optional)
Unperfused spleen
White pulp surrounded by red pulp (congested with blood)
White pulp - lymphatic nodule with germinal center, also in the form of PALS
Identify
(Optional)
Spleen
Capsule on left
Sinuses within red pulp “stained” with hemolyzed blood (arrows)
2 areas of white pulp
Identify
(Optional)
Spleen
Sinuses filled with hemoglobin
Cords - spongy meshwork
Identify
(Optional)
Lymph node, silver
Identify
(Optional)
Lymph node (silver)
Capsule along bottom
Reticular fibers stain black with silver
Identify
(Optional)
Perfused spleen, silver
Identify
(Optional)
Capsule on right
Trabeculum arises from capsule
White pulp in upper left
Red pulp with sinuses and cords
Identify
(Optional)
Tonsil (lingual)
Lymphoid tissue
Crypt filler with detritus
Underlying skeletal muscle
Glandular tissue
Identify
(Optional)
Crypt on right
Lymphoid tissue in center
Epithelium lower left
Several lymphatic nodules
Identify
(Optional)
Tonsil (pharyngeal)
Epithelial folds
Lymphoid tissue
Lymphatic nodules
Identify
(Optional)
Tonsil
Epithelial fold
Underlying lymphoid tissue
Identify
(Optional)
Tonsil
Hev: postcapillary venules with tall endothelium in the dense lymphoid (lt) between 2 lymphatic nodules
Identify
(Optional)
Tonsil
Hev: postcapillary venules with tall epithelium
