The respiratory system is vital to a human’s well being. In the “Health- Respiratory System” website, it says that an average person can only last about 30 seconds without breathing because your body needs the oxygen brought by breathing. The website also lists nine major organs in the respiratory system. When doing the stethoscope lab, this information was confirmed because I could hear my breathing near my nose, windpipe, and lungs.The nose not only gives a person their sense of smell but also filters the air to remove dirt and microbes. This is done through phlegm, a trap for dirt and microbes. The article from the textbook “The Respiratory System” says that mucus also moistens the air before it enters the body. It turns yellowish green when it is full of dead cells. It is constantly swept by cilia into the throat where it is swallowed. The nose also warms the air to an appropriate temperature.The epiglottis is a leaf-shaped piece of cartilage that keeps food out of the lungs. When there is food, the epiglottis covers the tube to the lungs so that you do not choke. Between the epiglottis and windpipe, there is a larynx, also known as a voice box. It is a backbone of cartilage known as Adam’s Apple, which is more noticeable in men than women. In the center of the larynx are the vocal cords. They are folds of membrane lining that vibrate when air flows through them. Vocal cords vibrate when you talk, sing, and cough. Another important organ in the respiratory system is the pharynx or the throat. It is a muscular tube that carries the air down to the windpipe. The trachea, or windpipe, takes air from the vocal cords to the lungs. It has ribs of cartilage to keep itself open. The air then travels through the bronchial tree. It gets its name from the tree like shape formed by airways that take the air to the bottom of the lungs. Similar to lungs, there are both left and right bronchial trees.The lungs have many small air sacs called alveoli. They are on the ends of the bronchioles which are the small airways of the bronchial tree. These small air sacs help oxygen get into your bloodstream. This process is called respiration. Respiration is different from breathing because respiration is the process where oxygen and glucose go into the body, while carbon dioxide and water exit the body. The walls of the alveoli are thin enough to allow oxygen through. The oxygen travels into the red blood cells which carry the blood throughout the body. Then, the deoxygenated blood cells return and give off carbon dioxide, which travels into the alveoli and out of the body through the lungs when you exhale.Finally, there are chest muscles and the diaphragm that contract and relax to expand and relax your chest. When the chest is expanded, air is forced into your lungs, and you inhale. When the chest relaxes air is forced out, and you exhale. Breathing is automatic because part of your brain is always controlling it, so you do not forget to breathe. In conclusion, many organs in the respiratory system make it possible for you to breathe and allow you to have the oxygen necessary to live.