Respiratory System Lab

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INTRODUCTION The respiratory system is what allows us to take in oxygen from the air and release carbon dioxide (Shuster and others 2014). The respiratory system is vital to the survival of a human. No one can survive without the help of the respiratory system. This system consists of pharynx, larynx, trachea, lungs, bronchi, and bronchioles, all of which have distinct and specific functions in the body. Some features of the respiratory system should be highlighted because they are the keys to respiration. Respiration starts when a person breathes in air. It goes down through the pharynx, larynx, and trachea before it reaches the lungs. Inside the lungs are bronchi, bronchioles, and alveoli. When air finally reaches the alveoli, which are tiny air sacs at the end of bronchioles, gas exchange and transport can begin. This is a huge part of respiration. The alveoli permits oxygen and carbon dioxide that is exchanged between the air and blood (Shuster and others 2014). Alveoli enables the lungs to inhale the maximum amount of oxygen and still fit comfortably inside the chest cavity. (Davidson and Morgan 2002) Gas exchange and…show more content…
The independent variable was the three different activities a person does between holding his or her breath, while the dependent variable was the amount of time a person could hold his or her breath. These variables must remain the same for the experiment to work. Before creating an experiment one must decide the experimental group and the control group. The control group must stay the same throughout the experiment because it will be used for comparisons. The control group of this experiment was the amount of time one could hold his or her breath after sitting quietly. To separate the control and experimental group the experimental group must change and in this experiment it was the amount of time one could hold his or her breath after hyperventilating (deep, forced breaths) and

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