Abstract:                                  The purpose of this lab experiment is to observe the impact of osmosis in cells.   and also how osmosis works and what are the different effects of different kinds of solutions to  cells. In this experiment, we utilized sheep blood  and varying centralizations of NaCl  arrangement, of 0.9 % Nacl , 0.15 % Nacl  and distilled water. Three setups were made where  in each set up was presented to a particular centralization of NaCl arrangement. All setups  were watched for few minutes under the microscope and every setup delivered distinctive  outcomes. In this activity it was discovered that the control of the centralization of  Solutions influences osmosis in red blood cells. This experiment is focus on how cell reacts  during each solution added to blood cells. During the experiment you will also notice that the  higher the solute concentration in the solution the greater its water potential will be.  the main  purpose of this experiment was to determine which  direction substance will flow. We also test  the movement of solutes from area higher concentration to the area of lower concentration.   Introduction:                      Molecules are in constantly motion,  they tend to move from areas of high  concentration, to areas of low concentration. This broad principle is divided into two  categories: diffusion and osmosis.  There are two type of membrane transport , active  transport and passive transport. Active transport is movement against the gradient from low to  high concentration. Passive transport is solute along with the concentration gradient with  higher to lower concentration therefore no energy needed.             Osmosis is the movement of solvent molecules through a selectively permeable  membrane into a region of higher solute concentration, to equalize the solute concentrations  on the two sides. The term osmosis also defined by the movement of a solvent through a  semipermeable membrane into a solution of higher solute concentration that trends to  equalize the concentrations of solute on the membrane ( marieb webster) .  Another key word  in this experiment is diffusion. Osmosis is movement of water from higher to lower  concentration of solvent or lower to higher concentration of solute.  There are 3 types of  solution that can occur in the body which is hypertonic, hypotonic and isotonic. Hypertonic  solution is higher solute concentration to less water concentration. Hypotonic solution is lower  solute concentration and more water. Isotonic solution in which water and solute molecules  are equal in concentration.           Diffusion is the net movement of molecules down    their concentration gradient. There  are many different factors that can affect osmosis. Such as a temperature, time  and size of concentration gradient. The higher the temperature osmosis  would move much faster than the lower temperature does.               The purpose of this lab is to observe the physical effects of osmosis and diffusion and  determine if it actually, takes place. We predict that after each solution added to blood cells,  we would have different result according to concentration of solute. We hypo these that molecules  tend to move along gradient higher to lower concentration, therefore water will diffuse across  semipermeable membrane. From higher concentration of water to the lower concentration of water.