The nuclear envelope in the developing oocytes of the tunicate, boltenia villosa.
D000818:Animals; D002467:Cell Nucleus; D043344:Chordata; D003593:Cytoplasm; D006801:Humans; D009685:Nuclear Envelope; D009865:Oocytes; D009866:Oogenesis; D010063:Ovum; D014561:Urochordata
CELL NUCLEUS; CHORDATA; OVUM; PROTOPLASM