ɐ nˈʌmbɚɹ ʌv stɹˈʌktʃɚz pˈæs θɹuː ðɪ ˌaɪvˌiːˈɛf: spˈaɪnəl nˈɜːv ɹˈuːts, ɐ ɹᵻkˈɜːɹənt mˈɛnɪndʒˌiəl nˈɜːv, ɹædˈɪkjʊlɚɹ ˈɑːɹɾɚɹiz wˌɛɹ pɹˈɛzənt, sɛɡmˈɛntəl mˈɛdəlɚɹi ˈɑːɹɾɚɹiz wˌɛɹ pɹˈɛzənt, ˌɪntɚvˈɜːɾɪbɹəl vˈeɪnz, ænd lɪmfˈæɾɪk vˈɛsəlz.
A number of structures pass through the IVF: spinal nerve roots, a recurrent meningeal nerve, radicular arteries (where present), segmental medullary arteries (where present), intervertebral veins, and lymphatic vessels.