The best answer for the blood vessels' valves would be these are veins that would then help in preventing the back flow of blood because the walls have small muscle to pump the blood back to the heart.Hope this is the answer.
-spadias that’s the suffix
Swimming is a great way to work out because it helps with the muscles in your arms and legs
⇒ Heart disease in not an inevitable part of growing older. Usually you develop heart disease between the age of 40-55. If you reach the age of 50 without developing the major risk factors for heart disease, you can live a full life without it, and your chances of dying from heart disease decrease from 50 percent to a strikingly low 8 percent. Here are some everyday tasks everyone can use and/or take to prevent heart disease:
1.) Don't use tobacco products.
2.) Exercise for 30 minutes 3-4 times a week.
3.) Eat a heart-healthy diet/meal.
4.) Maintain a healthy weight.
5.) Get regular health screenings.
6.) Try to manage stress.
I hope that this helps you out. I am very good with heath and doctor questions and problems. I study this kind of stuff everyday. Good Luck!