The Human Respiratory System Is A Series Of Organs...

Introduction The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The structural features of the respiratory system include nasal cavity, trachea, bronchi and lungs. Body cells need a constant supply of oxygen to generate energy to drive cellular activities, this however creates carbon dioxide as a waste product. Blood delivers oxygen to cells and removes carbon dioxide. When deoxygenated blood passes through the lungs the carbon dioxide is removed and replaced with oxygen. Breathing in (inhalation) brings oxygen in and breathing out (exhalation) releases carbon dioxide out of the lungs. Respiration mainly takes place in lungs. The lungs comprise millions of tiny sacs called alveoli, which allow for the exchange of these gases. Structure of the Respiratory System The Respiratory system can be broken into the upper and lower respiratory tract. The upper respiratory tract includes the nasal cavity, pharynx and sinuses whereas the lower respiratory tract contains the larynx, Trachea, bronchial tree, and lungs. Air enters the body through nose or mouth, it then travels down the back of your throat and into the trachea. The trachea then divides into two narrow tubes called bronchi. As the bronchi tubes pass through the lungs, they each divide into smaller air passages called bronchioles. The bronchioles branch out, getting smaller and leading to thousands of air sacs called alveoli. The alveoli are surrounded byShow MoreRelatedFunctions Of The Respiratory System860 Words   |  4 PagesFunctions of the Respiratory System Introduction The main purpose of the respiratory system is to exchange oxygen and carbon monoxide between the body and the environment. Throughout the body are specific organs and structures that make the respiratory system possible. In humans, respiration takes place in the lungs. 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