Ocular Reticles Lab Report

Using the same steps as finding the size of the Paramecium specimen with the ocular reticle and the stage micrometer. Any object can be found by first adjusting the microscope for Kohler illumination and using the 10x objective lens to observe the object. Use the course focus knob and adjust until the object is clear. Afterwards switch the nosepiece into a higher objective and adjust the current magnification with the fine focus knob until the object is in an acceptable field of view. Using the ocular reticle, determine the size of the object. Then divide the reticle units by the total magnification to determine the size of any object. For example, if the object was observed in a total magnification of 400 and the measurements were 20 reticle units by 10 reticle units. To determine the size in millimeters would be to divide the 20 by 400 and 10 by 400 to get a size of 0.05 mm by 0.025 mm.

The average length of the white blood cells observed was around 10 reticle units and the width was around 7 reticle units. To calculate this, the reticle units are
The more zoomed image showed that the red blood cells were roughly 5 reticle units in diameter. Also, there was a large quantity of red blood cells compared to the white blood cells. Red blood cells contain hemoglobin which carries oxygen throughout the body. Since the body constantly needs oxygen, there is a large amount of red blood cells. Red blood cells are also small and flat which allow hemoglobin to take in oxygen better (http://www.healthhype). White blood cells are very different as they are larger in size (roughly 8 reticle units in diameter), shaped irregularly and have a nucleus. The purpose of a white blood cell is to fight off any infections that enter your body. White blood cells are not needed as much as red blood cells which is why there is a lot less red blood cells then white blood cells (https://www.urmc)