Final answer:
The middle of the tooth containing the neurovascular bundle is called the pulp cavity. The root canal is the region of the pulp cavity that runs through the root of the tooth, surrounded by dentin and covered by cementum.
Step-by-step explanation:
The middle of the tooth that contains the neurovascular bundle is known as the pulp cavity. This area contains the tooth's nerves and blood vessels and is essential for the tooth's vitality. Within the root of the tooth, this pulp cavity extends into the root canal, which is surrounded by dentin, a bone-like tissue, and covered by cementum. The crown of the tooth consists of dentin that is topped by enamel, the hardest substance in the body.