Lymphatics Flashcards
The lymphatic system consists of
Lymph
Lymphatic vessels
Lymphatic organs and tissues
Primary lymphoid tissues
Bone marrow
Thymus
Bursa of fibricus- birds
Function of primary lymphoid tissues
Site of production of leukocytes and where immature wbcs are
Main roles of lymphatic system
Managing fluid body levels
Filtering bacteria
Housing of wbcs
Fatty acid absorption
Secondary lymphoid tissues
Lymph nodes
Tonsils
Spleen
MALT
GALT
Secondary lymphoid tissues function
Site of antigen challenge and where lymphocytes are activated
What way does fluid move
Interstitial space to blood
What is the function of valves
Prevent the backflow of blood
Can fluid be massaged back into the circulation
Yes
What do the lymphatic vessels carry
Lymph fluid
What are the valves shaped like
A V in histology
Two ways lymph can drain back
Right lymphatic duct
Thoracic duct
Is there a left lymphatic duct
No
What moves lymph
Physical pressure
Squeezing muscle
Smooth muscle
Breathing
Thoracic duct where does it drain to
Rest of the body
Right lymphatic duct where does it drain to
Right thoracic cavity
Right arm
Right side of head and neck
What veins does lymph fluid drain through
Right subclavian vein
Left subclavian vein
Lymphatic system components
Submandibular nodes
Cervical nodes
Axillary node
Thoracic duct
Inguinal node
Popiteal node
Lymph nodes where are they
Most are deep in tissues
Some are palpable
Lymphoid follicle components
Afferent lymphatic vessels
Cortex
Follicle
Medullary cord
Medullary sinus
Hilus
Efferent lymphatic vessels
Trabecula
Subcapsular sinus
Capsule
Germinal centre
Dark stain on lymphoid follicle
Corona
Trabecula
Fibre sections in between germinal centres
Capsule
Lining on follicle
Lymph node structure
Medullary sinuses
Medullary cords
Paracortical zone
Cortex- section near the top
Lymphoid follicles- at brim
Capsule- singular cell layer at top of follicle
