Final answer:
The resistance between various points on the human body, such as fingers and hands, is approximately the same. The resistance decreases when more skin area is brought into contact with the ohmmeter probes, and there is a significant drop in resistance when the skin is wet.
Step-by-step explanation:
The observations made by the student using an ohmmeter can be explained by the concept of resistance in the human body. The resistance between different points on the body, such as two points on the same finger or two points on opposite hands, is approximately the same. This indicates that the internal resistance of the human body is uniform throughout. When more skin is brought into contact with the probes of the ohmmeter, the resistance decreases. This is because the resistance of the skin decreases as more skin area is available for the flow of current. Lastly, there is a dramatic drop in resistance when the skin is wet. Wet skin has lower resistance compared to dry skin due to the presence of moisture.