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.

Input: Consider Input: Question: What do osteoblasts secrete that mineralizes to become bone matrix? Answer: collagen

Output: Osteoblasts make new bone cells and secrete collagen that mineralizes to become bone matrix. They are responsible for bone growth and the uptake of minerals from the blood.

Input: Consider Input: Question: Individuals with sickle cell anemia have crescent-shaped what? Answer: red blood cells

Output: Figure 39.21 Individuals with sickle cell anemia have crescent-shaped red blood cells. (credit: modification of work by Ed Uthman; scale-bar data from Matt Russell).

Input: Consider Input: Question: Methanogens in their gut enable what process in cows? Answer: digestion
Output: Cows are able to digest grass with the help of the methanogens in their gut.