I am good bro but if know algebra 1 good that can help me
The correct answer is Depressants
B. Mouthguards are needed to play hockey
Answer:With this system, blood always flows in only one direction inside the heart. There are also valves at the bottom of the large arteries that carry blood away from the heart: the aorta and the pulmonary artery. These valves keep the blood from flowing backward into the heart once it has been pumped out.
Explanation:
