22/13 is improper fraction.
Proper fraction is when the denominator is bigger or greater than the numerator e.g 20/3,6/1 etc
Improper fraction is when the denominator is smaller or less than the numerator e.g 3/20, 1/6 etc
Mixed fraction is when there is a whole number before a fraction e.g 2 1/2 52/3 etc
Because it was administered orally it would be broken down and destroyed in the GI (gastrointestinal) tract.
Answer:
Varicose veins can best be described as veins cannot prevent the backflow of blood.
Explanation:
Varicose veins are a manifestation of venous insufficiency or peripheral vascular insufficiency.
Veins are blood vessels that, unlike arteries, are not able to contract, so they depend on gravity, muscle contractions and a system of valves to be able to carry blood to the heart.
<u>When the venous valves do not work, the blood is not transported properly, backflow occurs and is retained, producing dilation of the vein walls, which is characteristic of varicose veins</u>. In this case, veins cannot prevent the backflow of blood.
The other options are not correct because:
- <em>Varicose veins do not lose their ability to transport blood.
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- <em>Veins cannot be used to transport blood from the heart.
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- <em>Failure to adequately transport waste to the heart does not apply in this case.</em>
The blood picks up carbon dioxide and waste from the tissue. The oxygen and nutrients go out of the blood into the tissue around the capillaries.
