What veins develop into renal and gonadal veins during embryonic development?

The correct answer is that the subcardinal veins develop into the renal and gonadal veins during embryonic development.

During early embryogenesis, the subcardinal veins initially form a network that is responsible for draining the developing kidneys. As the kidneys undergo growth and rotation, the subcardinal veins evolve into the definitive renal veins. This process is part of the complex formation and remodeling of the venous system, which is crucial for establishing proper circulation.

Additionally, the gonadal veins, which are responsible for draining blood from the ovaries and testes, also arise from the subcardinal veins. Each side's development typically shows that the left gonadal vein drains into the left renal vein, while the right gonadal vein connects directly to the inferior vena cava.

Understanding this provides insight into the embryological development of the vascular system and the specific roles different vein types play in the maturation of organ systems.