Final answer:
A a. histogram is a visual report used to verify the sizes and numbers of cellular components in blood analysis. A microscope is crucial for observing blood smears, enabling the counting and classification of cells such as leukocytes.
Step-by-step explanation:
The visual report of the sizes and numbers of various cellular components, which can be used to verify results of a blood smear and provide indications of potential issues with test results, is known as a histogram. This histogram is often derived from automated cell counters, which are used in laboratories for blood analysis. Moreover, it reflects the distribution of different cell types, such as red blood cells, white blood cells, and platelets, indicating conditions such as anemia or infections.
In the process of evaluating a blood smear, a microscope becomes essential. For instance, when observing a smear for a differential leukocyte count, one might systematically scan the smear and record the numbers and types of different leukocytes using a simple table. This approach helps determine whether the cellular elements' distribution falls within normal ranges or indicates an abnormal condition.
To accurately count cells like bacteria, devices such as a hemocytometer are used. This calibrated slide allows for the counting of cells under a microscope, helping to estimate the concentration of the cells in a culture. Similarly, for counting red blood cells, the same principles apply with proper adjustments for the specific type of cells being enumerated.