Situated just caudal to the acetabulum, the foramen is bound dorsally by the illium and ventrally by the ischium. The foramen transmitts the ischiadic nerves and vessels (Baumel et al. 1993).
incisura terminalis
incurrent foramen of ectepicondylar foramen
individual digit of digitopodial skeleton +
inflow tract +
inner ear foramen +
inner medulla vasa recta ascending limb
inner medulla vasa recta descending limb
insect embryonic/larval lymph gland
insect trunk mesoderm derivative +
interilial region
intermediate cell mass of mesoderm
intermediate mesenchyme
intermedium (fore)
internal anterior process of basipterygium
internal spermatic fascia
internal trochanter
internal urethral orifice
intertarsal sesamoid +
interventricular foramen intermedium
interventricular foramen of heart
intra-ocular muscle +
intrinsic muscle of tongue +
intumescentia bilateralis inferior
intumescentia bilateralis superior
ischial cartilage
ischial endochondral element +
ischial foot
ischial peduncle
ischial ramus +
ischial spine
ischiopubic ramus
isthmus of fallopian tube
jugular body
jugular bulb +
juxtaductal region of aortic arch
labium majora +
labium minora
lamina densa of glomerular basement membrane
lamina propria of ureter
lamina propria of urethra +
lamina propria of urinary bladder +
lamina propria of vagina
lamina rara externa
lamina rara interna
lamina terminalis of ischium
large intestine smooth muscle circular layer +
large intestine smooth muscle longitudinal layer +
late distal segment
lateral epicondyle of femur
lateral floor plate
lateral malleolus of fibula
lateral plate mesoderm +
lateral process of basipterygium
lateral tuber of ulna
lateral tubercle of astragalus
latissimus dorsi muscle
latissimus dorsi pre-muscle mass +
latissimus dorsi process
left renal pelvis
lesser tubercle of humerus
levator scapulae muscle
levator scapulae pre-muscle mass +
lieno-renal ligament
limb endochondral element +
lower part of vagina
lumbar vertebral foramen
major vestibular gland +
male preputial gland
manual digit mesenchyme +
manus connective tissue +
marginal zone of spleen
maxillary process mesenchyme from head mesenchyme
medial blade of ilium
medial epicondyle of femur
medial floor plate
medial pelvic process
mediale
membranous urethra of male or female +
mesangium +
mesenchyme from somatopleure +
mesenchyme from splanchnopleure +
mesenchyme of umbilical cord +
mesenteric fat pad +
mesenteric lymph node +
mesenteric lymphatic vessel
mesial pelvic ridge
meso-epithelium +
mesonephric capsule
mesonephric collecting duct
mesonephric early proximal tubule
mesonephric juxtaglomerular apparatus +
mesonephric late distal segment
mesonephric late proximal tubule
mesonephric mesenchyme +
mesonephric nephron +
mesonephric nephron progenitor
mesonephros +
mesopodial skeleton +
metanephric capsule
metanephric collecting duct +
metanephric cortex mesenchyme +
metanephric cortical collecting duct
metanephric descending thin limb +
metanephric juxtaglomerular apparatus +
metanephric long descending thin limb bend
metanephric mesenchyme +
metanephric nephron +
metanephric prebend segment
metanephric pyramid
metanephric renal pelvis
metanephros +
metanephros cortex +
metaphysis of femur +
metaphysis of fibula
metaphysis of humerus
metaphysis of radius
metaphysis of tibia
metapodial skeleton +
metapterygoid-quadrate fenestra
metoptic pillar
middle anterior process of basipterygium
mixed endoderm/mesoderm-derived structure +
moderator band
mucosa of fallopian tube +
mucosa of seminal vesicle
mucosa of ureter +
mucosa of urethra +
mucosa of urinary bladder +
mucosa of vagina +
Mullerian duct +
muscle layer of epididymis
muscle layer of oviduct
muscle layer of spongiose part of urethra
muscle layer of urinary bladder +
muscle of digastric group +
muscle rectus abdominis superficialis
muscle tissue +
muscular coat of seminal vesicle
muscular coat of ureter +
muscular layer of prostatic urethra
muscular layer of vagina
musculus rectus abdominis profundus
navicular fossa of spongiose part of urethra +
neck of femur
neck of fibula
neck of humerus
neck of radius
neck of talus
neck of urinary bladder +
nephrostome
neural lobe of neurohypophysis
Nobelian rod
notochord +
notochord posterior region
nucleus pulposus
nutrient foramen conduit +
obturator foramen
obturator process of ischium
occipital artery foramen
olecranon
olecranon fossa
olfactory nerve foramen
omentum +
optic foramen +
orbital foramen
orbitosphenoid +
orbitosphenoid septum
os clitoris
os penis
outer medulla vasa recta ascending limb
outer medulla vasa recta descending limb
outflow tract +
outflow tract pericardium
ovarian follicle +
ovarian ligament
paired fin radial element +
paired fin radial skeleton +
paired limb/fin field +
paired limb/fin skeleton +
papillary muscle of heart +
parenchyma of spleen +
parietal serous membrane +
pars cylindriformis ilei
pars reflexa of masseter
part of afferent arteriole forming the juxtaglomerular complex