pˈɛktᵻnˌeɪt mˈʌsəlz ʌvðɪ ˈeɪtɹiə ɑːɹ dˈɪfɹənt fɹʌmðə tɹˈeɪbkjʊlˌiː kˈɑːɹniː, wˌɪtʃ ɑːɹ fˈaʊnd ɔnðɪ ˈɪnɚ wˈɔːlz ʌv bˈoʊθ vˈɛntɹɪkəlz.
Pectinate muscles of the atria are different from the trabeculae carneae, which are found on the inner walls of both ventricles.