The answer is B, Muscles. I hope this helps! Have a good day!
Well to answer your question blood<span> enters the </span>heart through<span> two large veins, the inferior and superior vena cava, emptying oxygen-poor </span>blood<span> from the body into the right atrium of the </span>heart<span>. As the atrium contracts, </span>blood<span> flows from your right atrium into your right ventricle </span>through<span>the open tricuspid valve.</span>
Answer:
1. A That is substance abuse because you don't need to use it for something that small.
2. B marijuana is cannabis used for psychological dependency.