The rhombencephalon gives rise to which two secondary vesicles?

The rhombencephalon gives rise to which two secondary vesicles?

• A. Metencephalon and Myelencephalon
• B. Diencephalon and Telencephalon
• C. Mesencephalon and Prosencephalon
• D. Spinal cord and brainstem

Answer: (A)

The main idea here is how the hindbrain divides during early brain development. The rhombencephalon splits into two secondary vesicles: metencephalon, which forms structures like the pons and cerebellum, and myelencephalon, which forms the medulla oblongata. So the two secondary vesicles arising from the rhombencephalon are metencephalon and myelencephalon. The other options correspond to derivatives of the forebrain (telencephalon and diencephalon) or to parts that don’t become secondary vesicles (the midbrain, from the mesencephalon, and the spinal cord/brainstem as broader structures rather than specific secondary vesicles).

The main idea here is how the hindbrain divides during early brain development. The rhombencephalon splits into two secondary vesicles: metencephalon, which forms structures like the pons and cerebellum, and myelencephalon, which forms the medulla oblongata. So the two secondary vesicles arising from the rhombencephalon are metencephalon and myelencephalon.

The other options correspond to derivatives of the forebrain (telencephalon and diencephalon) or to parts that don’t become secondary vesicles (the midbrain, from the mesencephalon, and the spinal cord/brainstem as broader structures rather than specific secondary vesicles).