Kwayoyin tsoka mai santsi, wanda kuma aka sani da myocyte, nau'in kwayar halitta ce ta tsoka da ake samu a bangon gabobin ciki daban-daban, kamar ciki, hanji, mafitsara, mahaifa, da magudanar jini. Kwayoyin tsoka masu laushi ana siffanta su da tsayin su da siffa mai siffa, rashin striations, da iko na son rai. Suna taka muhimmiyar rawa wajen daidaita motsin abubuwa ta hanyar waɗannan gabobin ta hanyar yin kwangila da annashuwa don amsa abubuwa daban-daban, kamar hormones da siginar jijiya.