Answer:
I believe the answer is "C. When your cells need more oxygen."
Please mark brainliest, if right. Thanks :)
Answer:
I would say C cell membrane
Explanation:
Four chambered heart keeps oxygenated and deoxygenated blood separate and has double circulation while three chambered heart has a single circulation. Two chambered heart only has single atrium and single ventricle
<span>a.
identifying several solutions to a problem
b.
questioning source information
c.
implementing the first solution to a problem identified
d.
verifying source information</span>
