骨芽 こつが細胞 さいぼうじゃありませんでした
kotsuga saibōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 骨芽細胞

1. Was not a chondrocyte.; Was not an osteoblast.

Past/Perfective
Negative
Polite
Terminal Form