ðeɪ ɑːɹ ˌɔn ˈiːtʃ sˈaɪd ʌvðə fɹˈɛnjʊləm ðə pˈiːs ʌv tˈɪʃuː kənˈɛktɪŋ ðə bˈɑːɾəm ʌvðə tˈʌŋ tə ðɪ ɪnsˈaɪd ʌvðə mˈaʊθ ˌʌndɚ ðə tˈʌŋ ænd ɹˈʌn pˈæɹəlˌɛl nˈɛkst tə ðə tˈuː dɪstˈɪŋkt vˈeɪnz.
They are on each side of the frenulum (the piece of tissue connecting the bottom of the tongue to the inside of the mouth) under the tongue and run parallel next to the two distinct veins.