<span>Cell membrane protects, regulates and controls the movement of object that goes in and out of the cell.
Cell membrane is comprised of phospholipids (its major component ) which can create lipid bilayers because of their water attracting characteristics. Another lipid inside the cell membrane is </span>cholesterol, <span>which makes the cell membrane more fluid. Cholesterol is a waxy fat-like substance found in all cells of the body. </span>
<span>When you have a high cholesterol, it can create a plaque in your arteries thus, develop a high risk of heart disease. People who have high cholesterol has a greater possibility to acquire coronary heart diseases.</span>
<span>Reticulocytes are immature red blood cells.
Red blood cells that haven't fully developed, yet.
When our bodies lose a large amount of blood,
we rapidly produce reticulocytes,
so that our bodies can quickly replenish their red blood supplies.
And obviously, when we donate blood, we lose blood.</span>
Living in harmony with your surroundings. A persons regular surroundings are a major part of there environment. Although the other options will link to a persons environment, this is the best fitting answer.
