lymphatics histology Flashcards
identify the afferent lymphatic vessel
afferent = arriving
travels mainly through sinuses through lymph node to efferent vessel
identify the efferent lymphatic vessel
packed w lymphocytes but no erythrocytes
located in hilus of lymph node
identify the medulla
identify the cortex
where is the lymph nodule?
outer edge of cortex
name the region of the cortex near the junction with the medulla and without nodules
the para cortex (thymus-dependent region of the lymph node)
this is where most of the T cells in the node are located
identify the capsule
identify the hilum
the region where blood vessels enter and leave the lymph node
where an efferent lympathic vessel exits
identify the capsule of connective tissue (mostly collagen)
identify and explain what the trabeculum is
connective tissue that helps support/anchor cortex
identify the subcapsular sinus
(mostly collapsed)
identify the lymphatic nodule
a.k.a. the lymphatic follicle
identify the capsule
identify the sinus
identify the trabeculum
identify the reticular fibres
identify the reticular fibres
form a supporting reticulum to house wandering cells
identify the wandering cell
how can you tell apart a reticular fibre frrom a coarse Type I collagen fibre of the trabeculae and capsule?
reticular fibres = stain black
coarse type I collagen fibres = stain brown (as it has less carbohydrates on its surface)
identify the nucleus in the reticular cell
reticular cell (silver stain)
identify the cytoplasm in the reticular cell
reticular cell (siler stain)
what is a medullary cord?
long extension of a lymphatic nodule in the cortex
mostly contains B lymphocytes and plasma cells migrating out of the lymph node
identify the dialated medullary sinuses and state their function
medulla (x5 mag)
spaces for lymph to percolate
