Respiratory System
Krisha A. Aguilar Prof. Ivan Marcelo Duka
G-7L BIO 2
RESPIRATORY SYSTEM
The Respiratory system consists of organs and tissues that aid the oxygen to travel in the body and emits the waste gases out of the body. It is also called as the oxygen delivery system for it is the system responsible in delivering the oxygen to all parts of the body. The process of breathing, the inhalation of oxygen and exhalation of carbon dioxide, is called respiration. Respiration can be described into two processes: internal or cellular respiration, and external respiration. Internal respiration is the process of generating energy by oxidation of glucose or other small molecules. This process needs oxygen and it generates carbon dioxide. External respiration, or breathing, is merely the repeated process of taking oxygen and releasing carbon dioxide consecutively. Inhalation or inspiration makes the diaphragm contracts, creating a vacuum that forces the inhaled air to hasten into the lungs. On the contrary, exhalation or expiration makes the diaphragm to expand or to relax, returning to its normal form and size. Respiration is performed through the airways that include the mouth, nose, trachea, lungs, and diaphragm. Oxygen enters the respiratory system through the mouth and nose, which are the portals or entry points of air in the body. Nose or nasal cavity is liable for filtering the air by the hairs and mucous inside it. It helps to prevent harmful particles in the air from entering the lungs. It also moistens and warms the air. Then, the oxygen travels through the larynx, where the production of speech sounds is generated, and the trachea. Trachea, sometimes called as windpipe, lies in the neck and in a portion of the chest cavity. The cells in trachea produces mucus that helps in filtering the air or oxygen inhaled. Trachea splits into two bronchi. Bronchi are two air tubes that connect directly to the lungs to deliver the oxygen. Inside the lungs, bronchi are
G-7L BIO 2
RESPIRATORY SYSTEM
The Respiratory system consists of organs and tissues that aid the oxygen to travel in the body and emits the waste gases out of the body. It is also called as the oxygen delivery system for it is the system responsible in delivering the oxygen to all parts of the body. The process of breathing, the inhalation of oxygen and exhalation of carbon dioxide, is called respiration. Respiration can be described into two processes: internal or cellular respiration, and external respiration. Internal respiration is the process of generating energy by oxidation of glucose or other small molecules. This process needs oxygen and it generates carbon dioxide. External respiration, or breathing, is merely the repeated process of taking oxygen and releasing carbon dioxide consecutively. Inhalation or inspiration makes the diaphragm contracts, creating a vacuum that forces the inhaled air to hasten into the lungs. On the contrary, exhalation or expiration makes the diaphragm to expand or to relax, returning to its normal form and size. Respiration is performed through the airways that include the mouth, nose, trachea, lungs, and diaphragm. Oxygen enters the respiratory system through the mouth and nose, which are the portals or entry points of air in the body. Nose or nasal cavity is liable for filtering the air by the hairs and mucous inside it. It helps to prevent harmful particles in the air from entering the lungs. It also moistens and warms the air. Then, the oxygen travels through the larynx, where the production of speech sounds is generated, and the trachea. Trachea, sometimes called as windpipe, lies in the neck and in a portion of the chest cavity. The cells in trachea produces mucus that helps in filtering the air or oxygen inhaled. Trachea splits into two bronchi. Bronchi are two air tubes that connect directly to the lungs to deliver the oxygen. Inside the lungs, bronchi are