Lung Capacity And Breath Holding Time

1945 Words8 Pages
Abstract: This study was conducted to test whether or not lung capacity and breath holding time are positively correlated. After performing a simple study to test these two factors, it was found that they are in fact not correlated at all. Both lung capacity and breath holding time have many different influencing factors that make them uncorrelated to each other.

I. Introduction
To begin to understand lung capacity and breath holding, one must fully comprehend the anatomy and physiology of the two systems involved in respiration. While all cells in the body receive and use oxygen, it is the cardiovascular and respiratory systems that collect oxygen, transport it to cells, and remove harmful carbon dioxide from the body. When we inhale, oxygen enters the body through the mouth or the nasal cavity and then travels down the pharynx (throat) and through the larynx (voice box). The oxygen then enters the trachea (windpipe), a long tube that carries air to the lungs. The trachea branches out into two sections before arriving at the lungs, one tube per each lung. These two tubes are known as the bronchi. The bronchi are surrounded with small tubes of smooth muscle called bronchioles. These bronchioles can either constrict or dilate around the bronchi to allow more or less air to flow into the lungs. Finally, the bronchioles attach to thin sacs of air called alveoli. This is where gas exchange occurs. The cardiovascular system also plays a big role in respiration as it is the
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