臍帯 さいたい静脈 じょうみゃくじゃなかったです
saitai jōmyakujanakattadesu

Noun
Desu Copula

The polite, past negative form of 臍帯静脈

1. Wasn't the umbilical vein.

Past/Perfective
Negative
Polite
Casual Register