Exo means outside
So planets outside our solar system
Periosteum is the thin yet tough outermost layer of bones. Its many collagen fibers support the bone and firmly connect it to the surrounding structures. Osteogenic cells in the periosteum play a vital role in the growth and repair of bony tissue.
Americium, the atomic number is 93
Answer:
It's confident
Explanation: I hope this helped!
It is governed by diffusion.
