During the breathing cycle, air is inhaled, distributed throughout the lungs, and then exhaled. Lung volume includes a group of measures that quantify the amount of air that is inhaled or exhaled during both normal breathing and forceful breathing. In this experiment, you will be working with two of these measurements: Tidal Volume (TV): volume of air inhaled or exhaled during under normal breathing and Expiratory Reserve Volume (ERV), the amount of residual air that is exhaled under more forceful breathing. Measurements of lung volume will be conducted on a group of participants, from which you will determine if there is a difference in lung capacity between genders.
• Create a hypothesis for which gender has the largest lung volume.
• Conduct an experiment to measure the lung volume of participants.
• Collect data by recording the lung volume of participants.
• Analyze the collected data.
• Form a conclusion as to whether there are differences in lung volume, between genders.
When breathing in air (inhalation), the lungs fill up with air, from which oxygen is extracted. When exhaling, air is released from the lungs in the form of carbon dioxide. The amount of air held by the lungs is lung volume. Lung volume varies based on the individual. Size, gender, health, age, ethnicity, and geographical location are all factors that cause variation in lung volume. Tall people have a larger lung volume than short people. Being athletic and in good shape increases your lung volume, while health conditions or the lack of exercise can reduce it. People who live in high altitudes will have a larger lung volume than those who live at sea level. In this experiment, you will compare the lung volumes between genders, while eliminating the differences caused by the previously mentioned variables.