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:
Around 10 days I think. The world record was 11 days from a 17-year-old highschool student. I can deff relate to that kid.
Answer:
I would say keep your head up and work hard to learn and have a professinal help you train
Explanation:
False, It's the fluid/gel in between the lens and retina of the eye