Veterinary lymphatic system Flashcards
Lymphatic system
systema lymphaticum
name 4 primary or central lymphoid tissues
bone marrow (mammals),
cloacal bursa (birds),
thymus and
fetal liver
name 3 cell tpes that populate secondary lymphoid organs
lymphocytes,
macrophages and
dendritic cells
name 5 secondary or peripheral lymphoid tissues
lymph nodes,
spleen,
mucosa associated lymphoid tissue (MALT-system),
tonsils,
regional lymphoid tissue etc
lymphatic system has what three functions
immune defence
removal of interstitial fluid from tissues
transport of fats
lymphangion definition
is the functional unit of a lymph vessel that lies between two semilunar valves.
Lymph vessels are channels larger than the lymph capillaries that have thicker walls, valves in their lumen and smooth muscles in their walls, thus lymph vessel lymphangion is muscular and capable of contracting on its own.
2 latin terms for lymph node
lymphonodus; nodus lymphaticus
translate and define lymphocentre
lymphocentrum
a lymph node or a group nodes that occurs constantly in the same region and receives vessels from the same region in all species;
Car and Ru have rather large nodes,
eq has small nodes packeted together
translate lymph and describe its composition
lympha
the clear yellowish fluid, generally pale and
contains lymphocytes and proteins.
the lymph formed in the digestive system is called what and describe its composition
chyle, is rich in triglycerides (fat), and is milky white
lymphatic vessels
vasa lymphatica
what are vasa lymphatica?
channels larger than the lymph capillaries and with thicker walls, valves in their lumen and smooth muscles in their walls.
They converges on two or three large trunks that open into chylic cistern or major veins.
difference between lymph capillaries and lymph vessels other than size?
lymph capillaries are mainly responsible for the absorption of interstitial fluid from the tissues,
while lymph vessels propel the absorbed fluid forward into the larger collecting ducts
transalte Thoracic duct & function?
ductus thoracicus
is the major lymph-collecting channel for return of lymph to the bloodstream
where does the thoracic duct start?
starts near the aortic hiatus from chylic cisterna
what does the thoracic duct join cranially?
cranial vena cava or the left jugular vein
at cranial thoracic aperture
2 latin terms for tracheal trunk
truncus trachealis
[truncus jugularis]
where does the tracheal trunk originate?
where does it empty?
truncus trachealis [truncus jugularis]
originates from the retropharyngeal lymph nodes (except eq)
Usually the right duct ends in right lymphatic duct,
the left in thoracic duct, but may empty directly into the jugular vein.
right lymphatic duct
ductus lymphaticus dexter
where is the right lymphatic duct located?
and where does it lead?
ductus lymphaticus dexter
lymphatic vessel in the right-caudal part of the neck
drains cervical, thoracic and axillary nodes and right tracheal trunk
joins with cranial vena cava or one of its branches
Chylic cistern
cisterna chyli
what is the chylic cistern?
cisterna chyli
is lymphatic sac dorsal to abdominal aorta and collects lymph from visceral, and lumbar trunks
(drains the abdomen, hind limbs and the pelvic regions)
What are lymph nodes surrounded by?
connective tissue capsula
contains some elastic and smooth muscle fibers
afferent lymph vessels
vasa lymphatica afferentia
lymph sinus
sinus lymphaticus
where do afferent lymph vessels open into?
vasa lymphatica afferentia
open into subcapsular lymph sinus at different sites
efferent lymph vessels
vasa lymphatica efferentia
which species lymph node hilus is the site for entry of afferent lymph vessels (in addition to blood vessels & nerves)
su
which species lymph node hilus is the site for entry of efferent lymph vessels (in addition to blood vessels & nerves)
Car, Ru, eq
lymphatic nodules
lymphonodulus
the lymph node cortex contains what ?
primary and secundary lymphatic nodules
(lymphonodulus) with germinal centres
the lymph node medulla consists of ?
looser branching cellular cords
plasma cells,
lymphocytes and
macrophages attached to reticular fibers
and sinuses
What is unique about the lymph nodes of sus scrofa?
the tissue of the lymph nodes of su shows a reversal of the usual flow pattern
in su where is the lymphatic hilus located?
in su the hilus is on the concave surface
afferent lymphatic vessels enter the nodes on what surface?
the convex surface of the organ
afferent lymphatic vessels enter from the convex surface of the organ and open into the?
subcapsular sinus.
what are hemal lymph nodes? and where are they found?
resemble lymph nodes but their sinuses are filled with blood. They have functions like those of the spleen
hemal lymph nodes occur under the peritoneum along the vertebral column, in some viscera in Ru, eq, su;
parotid lymphocentre
lymphocentrum parotideum
where is the parotid lymphocentre and what does it drain?
lymphocentrum parotideum
near the parotid gland, drains the cranial regions
superficial parotid lymph nodes
lnn. parotidei superficiales
deep parotid lymph nodes and found in which species
lnn. parotidei profundi; su
mandibular lymphocentre
lc. mandibulare
lc. = lymphocentrum
where is the mandibular lymphocentre and what does it drain?
lc. mandibulare
in the caudal half of intermandibular region, drains the facial regions
mandibular lymph nodes
lnn. mandibulares
accessory mandibular lymph nodes and found in which species
lnn. mandibulares accessorii; su
retropharyngeal lymphocentre
lc. retropharyngeum
lc. = lymphocentrum
where is the retropharyngeal lymphocentre and what does it drain?
lc. retropharyngeum
in retromandibular fossa, drains the deep structures of the head
medial retropharyngeal lymph nodes
lnn. retropharyngei mediales
lateral retropharyngeal lymph nodes
lnn. retropharyngei laterales
superficial cervical lymphocentre
lc. cervicale superficiale
where is the superficial cervical lymphocentre and what does it drain?
lc. cervicale superficiale
in front of the shoulder, drains thoracic wall and thoracic limb
superficial cervical lymph nodes
lnn. cervicales superficiales
superficial cervical lymph nodes are found in what species?
lnn. cervicales superficiales
ca, Ru, eq
dorsal superficial cervical lymph nodes
lnn. cervicales superficiales dorsales
dorsal superficial cervical lymph nodes are found in what species?
lnn. cervicales superficiales dorsales
fe, su
medial superficial cervical lymph nodes
lnn. cervicales superficiales medii
medial superficial cervical lymph nodes are found in what species?
lnn. cervicales superficiales medii
su
ventral superficial cervical lymph nodes
lnn. cervicales superficiales ventrales
ventral superficial cervical lymph nodes are found in what species?
lnn. cervicales superficiales ventrales
fe, su
deep cervical lymphocentre
lc. cervicale profundum
where is the deep cervical lymphocentre and what does it drain?
lc. cervicale profundum
chain of nodes along trachea, draining the deep cervical structures
deep cervical lymph nodes
lnn. cervicales profundi
axillary lymphocentre
lc. axillare
where is the axillary lymphocentre and what does it drain?
lc. axillare
within the axilla on the medial muscles of the shoulder, drains the lateral thoracic wall and the thoracic limb
proper axillary lymph nodes
lnn. axillares proprii
axillary lymph nodes of the first rib
lnn. axillares primae costae
accessory axillary lymph node
ln. axillaris accessorius
In What species are accessory axillary lymph nodes found?
ln. axillaris accessorius
Car, eq
bo, ov
basically everyone except pigs
cubital lymph nodes
lnn. cubitales
eq, ov
In what species are cubital lymph nodes found?
lnn. cubitales
eq, ov
dorsal thoracic lymphocentre
lc. thoracicum dorsale
Where is the dorsal thoracic lymphocentre and what does it drain?
lc. thoracicum dorsale
is along the dorsal aspect of thoracic aorta,
primarily drains the dorsal and lateral parts of the thoracic wall
thoracic aortic lymph nodes
which species are they absent in
lnn. thoracici aortici
absent in ca and sometimes fe
intercostal lymph nodes
which species are they absent in?
lnn. intercostales
inconstant in general,
may be absent in Car, su
ventral thoracic lymphocentre
lc. thoracicum ventrale
where is the ventral thoracic lymphocentre and what does it drain?
lc. thoracicum ventrale
along the dorsal aspect of sternum,
drains the ventral and lateral thoracic wall, diaphragm, mediastinum
sternal lymph nodes
lnn. sternales
mediastinal lymphocentre
lc. mediastinale
translate mediastinal lymphocentre and what does it drain?
lc. mediastinale
drains thoracic wall and and organs
cranial mediastinal lymph nodes
lnn. mediastinales craniales
translate medial mediastinal lymph nodes and in which species are they absent
lnn. mediastinales medii
absent in Car, su, sometimes eq
translate caudal mediastinal lymph nodes and in which species are they absent
lnn. mediastinales caudales
absent in Car, sometimes in eq
bronchial lymphocentre
lc. bronchale
lc. = lymphocentrum
where is the bronchial lymphocentre and what does it drain?
lc. bronchale
located about the tracheal bifurcation, drains organs in thoracic cavity
translate right tracheobronchial lymph nodes
inconstant in what species?
lnn. tracheobronchales [bifurcationis] dextri
inconstant in Ru
left tracheobronchial lymph nodes
lnn. tracheobronchales [bifurcationis] sinistri