Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Example Input: Question: What are the bones in partly movable joints held in place by? Answer: cartilage
Example Output: Partly movable joints allow only very limited movement. Bones at these joints are held in place by cartilage. The ribs and sternum are connected by partly movable joints.

Example Input: Question: Oxygenated blood is transported by what system? Answer: circulatory
Example Output: Oxygenated blood is transported by the circulatory system from lungs to tissues throughout the body.

Example Input: Question: Which type of joints do not allow any movement of the bones? Answer: fixed
Example Output:
The skull has fixed joints. Fixed joints do not allow any movement of the bones, which protects the brain from injury.