Answer the following question given this paragraph: 

Blastocyst. The blastocyst consists of an outer layer of cells called the trophoblast and an inner cell mass called the embryoblast. The blastocyst fluid-filled cavity is also known as the blastocoel or blastocoele.


Q: What structure consists of an outer layer of cells called the trophoblast and an inner cell mass called the embryoblast?


A:
blastocyst