Lymphatic System Flashcards
Functions of Lymphatic System (4)
Tissue drainage
Absorbs and transports fat
Immunity
Return plasma and plasma protein to to circulation via venous system
Purpose of blood plasma being forced into extracellular space
Exchange nutrients, gases and waste
Lymphatic capillaries
loosely overlapped endothelial cells that are unidirectional and have flap like valves
Lymph vessels are _____ ending
Blind
Lymph
fluid and plasma proteins
Flow of lymph
Similar to vein
rely on smooth muscle contraction
Fluid moves by osmosis as there is protein accumulation in the extravascular space
Lymphatic capillaries drain into____
Lymph nodes
Lymph nodes are_____
Collection of collagen fibres that contain WBC
Afferent
Drain into lymph node
Efferent
Drain away from lymph node to trunk
Lymph node flow
Afferent –> LN –> efferent—>Trunk –> duct –> large veins (supa vena cava)
Lymph nodes are surrounded by _____
Fibrous tissue capsule
Lymph Node pathology
Primary tumours - Hodgkin’s
Secondary Tumours - metastasis
Drainage Routes
Drainage is symmetrical
Congregate into 2 ducts (thoracic, right LN)
Where do the lymph from the ducts empty to
Jugular and subclavian junction
