Final answer:
The cephalic flexure is a major curve between the brain stem and forebrain, while the cervical flexure is a flexion of the neck or body in the anterior direction.
Step-by-step explanation:
The cephalic flexure and cervical flexure are terms used to describe curves in the vertebral column. The cephalic flexure refers to the major curve between the brain stem and forebrain. This curve allows the neuraxis to start in an inferior position and end in an anterior position. The cervical flexure, on the other hand, is a flexion of the neck or body in the anterior (forward) direction.
For example, imagine a four-legged animal standing up on two legs. Without the cephalic flexure, the animal would be looking straight up instead of straight in front. The cervical flexure allows for movement and flexibility in the neck.