The Spleen Flashcards
RE system includes all cells and tissues that exhibit ____
phagocytosis
RE is one of the body’s major systems against
infection
hematopoiesis
formation of blood cells
hematopoiesis in the fetus (3)
spleen
liver
bone marrow
hematopoiesis postnatally
bone marrow
RE system includes (7)
brain
blood
spleen
liver
thymus
bone marrow
lymph nodess
thrombovytes AKA
platelets
leukocytes play a role in ____
immunity
leukocytosis and what it is seen with
increased WBC may be seen in the presence of infection
leukopenia and what it is seen with
decreased WBC may be seen with drug/chemical toxicity, viral infection
there are ___ different types of WBC but we only need to know that they can be either ____ or ____
5
phagocytic
non-phagocytic
3 parts of immune response
recognition (alien or not)
produce antibodies or antitoxins
produce memory cells
humoral immune respone
atibodies (gamma globulins) are liberated into the plasma by committed lymphocytes
cell mediated immune response
lymphocyte produces antitoxins that are retained within the lymphocyte cells
attaches to antigen -> secretes antitoxin
antigen and lymphocyte both die
(romeo and juliete)
what is the largest unit of the RE system
spleen
spleen develops around the ____ of gestation
5th week
spleen arises from the ___derm
mesoderm
hematopoesis in spleen starts at about ____ weeks and ends ___
11 weeks
after birth
spleen is located along the long axis of the ___ rib
10t
3 ligaments that anchor spleen
gastrosplenic
splenorenal
phrenocolic (hammock)
4 things medial to spleen
stomach
tail of pancreas
splenic flexure
left kidney
stomach is ___ to spleen
ant
length of spleen is usually ___ but we dont want it over ___
11cm
12cm
width of spleen
height of spleen
7-8cm
3-4cm
moderate splenomegaly
vs
severe splenomegaly
> 12cm-18cm
vs
18cm
spleen is enlarged if it is more than ___ the kidney size of if you visualize a flattened ____ kidney
2x
caudal
main spleen vessels course through the
splenorenal ligament
is spleen essential to life
no
spleen is divided into ___ and these contain 2 types of ___ : ____ and ___
lobules
pulp
red
white
red pulp (what, contains)
venous component of spleen
splenic sinuses and splenic cords
phagocytic cells line the sinusoids
white pulp (what, contains, produces)
tiny islands of lymphatic tissue in the spleen
contains lymphocytes and macrophages
produces antibodies
RE function of spleen (2)
produce lymphocytes and antibodies
store iron and metabolites
organ specific function of spleen (3)
filter blood
blood reservoir
erythropoiesis (fetus)
3 patient positions for spleen
supine decubitus RPO
patient arm position for spleen
extend/relax arm over head
spleen is very ____ (texture)
homogenous
spleen is ____ echogenic than kidney
more
spleen is ___ or slightly _____ to liver
isoechoic
more echogenic
pseudoperisplenic lesion
occurs in thin patients
L lobe liver superior to spleen
mimics sub capsular hematoma/abscess
what may be mistaken for a spleen mass
fluid filled stomach and tail of panc
born again spleen
hypertrophy of an accessory spleen or other splenic tissue post splenectomy
