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Terms in this set (21)
The respiratory system is the set of organs that allows a person to breathe and exchange oxygen and carbon dioxide throughout the body. An example of a respiratory system is the human's nasal passages, larynx, trachea, bronchial tubes, and lungs.
Upper Respiratory Tract
The Upper Respiratory Tract contains the Nasal Cavity, the Larynx, and the Phrarnyx.
Nasal Cavity is the main entrance and exit of air (however the mouth also serves as an entrance and exit of air). The Nasal Cavity warms, filters, and humidifies the air when it enters the body. It has Cillia, which is used to filter the air. It also contains Nasal Mucosa, which produced mucus.
The pharynx or the throat is a tube lined by mucous membrane that is continuous with that of the nasal cavities. It is a common passageway for both food and air.
Larynx or Voice Box functions mainly for speech. It leads air into the appropriate channel and is made up of hyaline cartilage and the epiglottis.
The Epiglottis prevents the food from reaching the lower respiratory tract.
Branched airways ending at air sacs (alveoli) of lung tissue
Trachea or Wind Pipe is formed by stacked, C-shaped pieces of cartilage that are connected by dense connective tissue. The Trachea consists of ciliated mucosa which transports mucus that has been contaminated with foreign bodies away from the lungs toward the throat.
The trachea branches into two large tubes, called bronchi (singular, bronchus), which leads to the lungs.
Terminal air sacs that constitute the gas exchange surface of the lungs.
Dome muscular structure that extends across the floor of the chest cavity that helps during the process of respiration
Mechanisms of Gas Exchange
Breathing and Respiration
Breathing, which is also called pulmonary ventilation. It is the mechanical action of getting oxygen and removing carbon dioxide in the body. We breathe through the processes called inhalation and exhalation.
Types of Breathing
Worms use integumentary respiration (breathes through the skin), sharks and fish uses gills to breath, insects use a tracheal system, and mammals use lungs.
External openings found in some animals like insects and spiders, and helps the oxgen to reach internal respiratory organs (lungs)
When you inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
When you exhale, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity. As the space in the chest cavity gets smaller, air rich in carbon dioxide is forced out of your lungs and windpipe, and then out of your nose or mouth.
Chemical process that provides energy that makes an organism function
External Respiration is the transportation of gases with the circulatory system. In external respiration, the alveoli and capillaries are so close that O2 and CO2 diffuse between the respiratory system and the bloodstream.
Internal Respiration is the exchange of gases with body cells. Internal Respiration delivers O2 from the lungs to other tissues of the body. It takes out CO2 from the tissues back to the lungs as a waste product for exhalation.
Cellular Respiration is our body's energy releasing process. It occurs when food is broken down and energy is released. This process is fueled by O2 and produces CO2 as a waste product.
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