Although cells may have quite different structures and functions, all cells share some common characteristics. The plasma, or cell membrane, forms the outer boundary of the cell through which the cells interacts with its external environment. The nucleus is usually located centrally and functions to direct cell activities, most of which take place in the cytoplasm, located between the plasma membrane and the nucleus.

The plasma membrane is the outer part of a cell. The plasma membrane is made up of 45% - 50% lipids, 45% - 50% proteins, and 4% - 8% carbohydrates. The main lipids are phospholipids and cholesterol. Phosp

bilayer communication; marker molecules enable cells to recognize one another

Some common words found in the essay are:
CELL MEMBRANE, CYTOSOL Cytosol, ATP ATP, ENDOPLASMIC RETICULUM, SPINDLE FIBERS, APPARATUS Golgi, MITOCHONDRIA Mitochondria, FLAGELLA Cilia, LYSOSOMES Lysosomes, , plasma membrane, endoplasmic reticulum, golgi apparatus, actin filaments, cell division, chemical reactions, smooth endoplasmic, lipid bilayer, nm diameter, smooth endoplasmic reticulum, spindle fibers, rough endoplasmic reticulum, cell structure function, red blood cells, plasma membrane containing,
Approximate Word count = 4518
Approximate Pages = 18 (250 words per page double spaced)