Flashcards in Lymphatic System Deck (14):
1. Fluid recovery: excess interstitial fluid is returned to general circulation
2. Immunity: secondary Structures act as homes for WBC
3. Lipid absorptions: Lacteals absorb sipids into cisterna chyli
Fluid flowing through lymphatic vessels. (extra interstitial fluid picked up by lymphatic vessels)
Directly involved in production or maturation of WBC.
Red bone marrow: located between trabeculae in spongy bone. (Skull, vertebrae, ribs, sternum, ossa coxae, proximal epiphyses of humerus and femur)
In superior mediastinum. T-cell maturation.
2 fused thymic lobes surrounded by CT "capsule"
CT has fibrous extensions called trabeculae
Capsule, Cortex, medulla.
Cortex has immature T-lymphocytes
Medulla has mature T-cells
Red Bone marrow
Site of Hemopoesis
Secondary lymphatic structures
Store lymphocyte and other immune cells. Composed of lymphatic cells enmeshed within a reticular extracellular CT matrix.
Filter and cleanse lymph. Acts as site for immune response activation.
Afferent lymphatic vessels bring lymph in. Efferent lymphatic vessels bring lymph out.
Lymph node histology
Capsule: CT with internal extensions called trabeculae.
Cortex: Many lymphatic nodules with germinal center that house proliferating B-Cells and macrophages.
Mantle zone (Outside of germinal center) has increased T-Cells.
Inner Medulla: B-cells, T-cells, macrophages, supported by medullary cords
Lymph node locations
Cervical, axillary, bachial, thoracic, intestinal, inguinal, popliteal
Contains red pulp (erythrocytes and platelets) and white pulp (leukocytes). Filters blood past white pulp to check for pathogens.
Pharyngeal (monitors mucus in nasal cavity), palatine, lingual (Monitors fluid from oral cavity)
Mucosa-associated lymphatic tissue. Dispersed lymphatic tissue throughout mucosal membranes (GI, respiratory, genital, urinary)