Answer:
The microscopic structural unit of compact bone is called an osteon, or Haversian system. Each osteon is composed of concentric rings of calcified matrix called lamellae (singular = lamella).
Explanation:
<span>Cytoplasm, DNA, cell membrane, and vacuole</span>
ATP is a high-energy molecule found in every cell. Its job is to store and supply the cell with needed energy. hope this helps :)
The answer is C.) Sac. More formally known as the amniotic sac. It's also sometimes called the bag of waters.
