All vertebrate brains share a common underlying form, which appears most clearly during early stages of embryonic development. In its earliest form, the brain appears as three swellings at the front end of the neural tube; these swellings eventually become the forebrain, midbrain, and hindbrain (the prosencephalon, mesencephalon, and rhombencephalon, respectively). At the earliest stages of brain development, the three areas are roughly equal in size. In many classes of vertebrates, such as fish and amphibians, the three parts remain similar in size in the adult, but in mammals the forebrain becomes much larger than the other parts, and the midbrain becomes very small. COUNT 5
QSN1 The forebrain during development is known as what? ANS1 prosencephalon QSN2 The midbrain during development is known as what? ANS2 mesencephalon QSN3 The hindbrain during development is known as what? ANS3 rhombencephalon QSN4 Which group of animals does the forebrain grow the largest? ANS4 mammals QSN5 During development, the brain is made up of three swellings at the front of what? ANS5 neural tube;