骨芽 こつが細胞 さいぼうではありませんでした
kotsuga saibōdewārimasendeshita

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
Formal Register