When the ventricle starts contracting, deoxygenated blood is pumped through the pulmonary artery to the lungs.
wˌɛn ðə vˈɛntɹɪkəl stˈɑːɹts kəntɹˈæktɪŋ, diːˈɑːksɪdʒˌɛneɪɾᵻd blˈʌd ɪz pˈʌmpt θɹuː ðə pˈʌlmənˌɛɹi ˈɑːɹɾɚɹi tə ðə lˈʌŋz.