Final Lymph, Sacrum/Pelvis Flashcards
Lymph
excess tissue fluid
network of lymphatic vessels that withdraws lymph from interstitial fluid compartment
filters lymph through nodes
returns it to bloodstream
Lymph flow from extracellular spaces
Blood capillaries
–> afferent lymphatic vessel
–> lymph node (filtration occurs here)
–> efferent lymphatic duft
Right lymphatic duct
right superior quadrant of body drains to venous systems via this duct
Thoracic duct
left superior qyadrant and lower two quadrants of entire body drain to venous system via this duct
Pelvis
inferoposterior to abdomen
transition between trunk and lower limbs
Pelvic cavity
inferiormost part of abdominopelvic caivty
Pelvic girdle
bony pelvis
Greater pelvis
ilium
ischium
false pelvis
some abdominal viscera found here
Lesser Pelvis
pelvic bone
pelvic cavity
true pelvis. area between pelvic inlet and outlet
Pelvic girdle characteristics
made up of ilium, ischium, pubis, sacrum, coccyx
Strong and rigid
Functions of pelvic girdle
bears weight of upper body
weight transfer from axial to lower appendicular skeleton
muscle attachment
containment and support of viscera
attachment of external genitalia
Pelvic inlet
superior pelvic opening. Covers sacrum, illium, pubis
separates greater pelvis and lesser pelvis
Pelvic outlet
inferior pelvic opening
formed by ischium and coccyx
Spinous processes of sacrum
median crest
Sacral hiatus
nerves come through here
Lamina of sacrum
intermediate crest
Transverse processes of sacrum
lateral crest
Lumbosacral angle
angle between long axis of lumbar region of vertebral column and sacrum
Body weight transferred through…
L5 to base of sacrum (S1)
Joints of pelvic girdle
lumbosacral joint
sacro-illiac joint
sacro-coccygeal joint
pubic symphysis
Illiolumbar ligament
attach both L4, L5 lumbar vertebrae to iliac crest
strong band of connective tissue
role in stabilization of lumbosacral and sacroiliac joints
Anterior sacroiliac ligament
sacrum to ilium
resistance to relative anterior sacral tilt (nutation)
Sacrotuberous ligament
sacrum to ischial tuberosity
fan-shaped
role in stabilization of sacroiliac joint
resistance to anterior sacral tilt and rotation of pelvis
passes posterior to sacrospinous ligament
Sacrospinous ligament
sacrum to ischial spine
creates greater and lesser foramen
role in stabilization of sacroiliac joint
Posterior sacroiliac ligament
attach PSIS with lateral crest of sacrum
strong
resists posterior sacral tilt
Contents of Pelvic cavity
terminal parts of ureters
urinary bladder
rectum
pelvic genital organs
blood vessels
lymphatics
nerves
Pelvic diaphragm is made of
levator ani and coccygeaus
Thoracic and pelvis movement
Thoracic going down = contracting
Pelvis going down = relaxing
Pelvic diaphragm is suspended by
pubic symphysis and pubic bones (anterior)
ilia (lateral)
sacrum and coccyx (post)
Pelvic floor is the same thing as
pelvic diaphragm
Function of pelvic floor
support of pelvic viscera
maintain urinary and fecal continence
allow voiding, defecation, sexual activity, childbirth
Levator Ani
O: pubis, ischium
I: anal canal, coccyx
A: support/maintain position
Coccygeus
O: spine of ischium
I: sacrum and coccyx
A: support/maintain position
C3, 4, 5…
keeps the diaphragm alive
S2, 3, 4
keeps the “p”s off the floor
