Functions of the Cell Membrane. 1. Mechanical Structure (a) Defines/encloses the Cell. A cell membrane encloses and defines the cell. There are different ways to express this, e.g. 1  The cell membrane maintains the physical integrity of the cell.
Therefore, the Virgo zodiac traits are emotional detachment, deviousness, excessive tidiness, loyalty, and civility. Virgos are normally eloquent with words and the languages, have good manners, and are quite sensitive to criticism. Moreover, a typical Virgo has an incredible eye for detail and precision.
As we age, the gel-like substance that fills the eye (the vitreous) shrinks and separates from the retina. This is called a vitreous detachment, or posterior vitreous detachment (PVD) .In most cases, a vitreous detachment is not sight-threatening and does not require treatment.s we age, the gel-like substance that fills the eye (the vitreous) shrinks and separates from the retina. This is called a vitreous detachment, or posterior vitreous detachment (PVD) .