心肌 /xīnjī/ angolul

cardiac muscle [cardiac muscles]▼(involuntary muscle)
noun
[UK: ˈkɑː.dɪæk ˈmʌs.l̩] [US: ˈkɑːr.di.ˌæk ˈmʌs.l̩]

myocardium [myocardia]▼(muscles that surround and power the heart)
noun
[UK: ˌmaɪəˈk.ɑː.diəm] [US: ˌmaɪəˈk.ɑːr.diəm]