2. The vertebrae in the backbone (a) are muscles. (b) protect the spinal cord. (c) are part of the circulatory system.

The vertebrae in your backbone are like your body's personal armor, guarding the delicate spinal cord that runs through them. This bony structure not only supports your posture but also allows you to bend and twist freely while keeping that important nerve highway safe from harm! When it comes to real-world application, think of the vertebrae as the framework of a house. Just as beams support the roof and protect everything inside, your vertebrae support your body's weight, help you move, and play a crucial role in protecting your central nervous system. Without them, well, things would get a little wobbly!