Answer:
Organ systems are organs that work together to perform a specific bodily function, so your answer is D
Explanation:
Mylenation - an insulator along the axon
Plants, Animals, and bacteria
Metals conduct electricity and heat, indicating that the electrons are free to move. Metals are malleable, showing that atoms are not in fixed positions but can remain bonded even though they change their positions. In metallic bonding, atoms donate electrons to a pool and all the atoms share in the pool. No compounds are formed, but the atoms are bonded into a network.
