I think the first one is b
The muscular system can be broken down into three types of muscles: skeletal, smooth and cardiac, according to the NIH. Skeletal muscles are the only voluntary muscle tissue in the human body and control every action that a person consciously performs. The muscle that is found at the heart is Cardiac Muscle. It is an involuntary, striated muscle that constitutes the main tissue of the walls of the heart. Hope this helps.
<span>b. chemistry, specifically the anions within the chemical formula</span>
Abiotic refers to NONLIVING things. Such as rocks..
Sooooo it would be water because although there are so many living things in water the actual chemical compound of H2O is nonliving.
C