<span>A.it increases the efficiency with which the body delivers oxygen and nutrients to its cells</span>
<span>From the provided choices in this item, the statement that best describes the importance of rules in games is that, "Rules are written to protect the safety of the participants". This is the major benefit we get from the rules implemented during the game. Although other rules may not be written and has been only verbally agreed among the participants. </span>
The answer is the D.<span>
<span>All of the choices above are good practices that would increase the chance of attaining a successful personal fitness program. Goals that are broken down into short-term and long-term goals ensure a person's commitment to specific fitness goals. Activities that interest a person is a motivating factor to improve the quality of a person's fitness program; while implementing a reward system (e.g. ice creams only during Fridays, eating fastfood at the end of the week) removes the plateau and boredom of following a strict exercise routine.</span></span>
A doctors office provides the most personalized medical care.
Answer: They cannot bend or move easily, they are not flexible as normal cells and they can block the blood flow.
Explanation:
Sickle cell or sickle cell disorder( SCD) is a group of red blood cell disorders that are inherited and they cannot bend or move easily in a human body.
A Normal cell is round-shaped and normal cells can move through blood vessels. they are carrying oxygen to all parts of the human body and sickle-shaped cells cannot do that. A Sickle-shaped cell can block that blood flow and it can cause many problems and diseases in the human body.
