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Chapter 14
The Respiratory System 14.1-14.2
Term | Definition |
---|---|
Primary Function | Gas exchange of oxygen and carbon dioxide. |
Inspiration/Expiration | Breathing in/breathing out |
Four Respiratory Actions | 1) Pulmonary ventilation 2) External respiration 3) Internal respiration 4) Transport of gases to and from lungs/tissue |
Mucociliary escalator | The bodies use of ciliated tissue to direct mucous/contaminates toward the throat so they can be swallowed. |
Parts of upper respiratory tract | Nasal cavities, pharynx, glottis, and larynx |
Parts of lower respiratory tract | Trachea, bronchi, bronchioles, lungs, alveoli, and pulmonary capillaries |
Nostrils | The two external openings in the nose. |
Nasal cavities | The spaces in the nose that are separated by a central septum. |
Nasal conchae | Ridges found inside of the nasal cavity to increase surface area. |
Pharynx | The funnel-shaped passageway that connects the nasal and oral cavities to the larynx. Three parts: laryngopharynx, nasopharynx, and the oropharynx. |
Larynx | Noted by the Adam's apple, the larynx contains the vocal cords. The space between the vocal cords is known as the glottis. |
Epiglottis | The flap of cartilage that covers glottis/larynx when food is swallowed. |
Trachea (Windpipe) | The tube connecting the larynx to the primary bronchi. The trachea is supported by C-shaped cartilage rings. |
Bronchi | The passageways that lead to the right or left lungs. |
Bronchioles | Smaller passageways that branch off of bronchi. The bronchioles lead to the alveoli. |
Alveoli | Small sacs or air pockets that are the site of gas exchange. |
Pulmonary capillaries | Capillaries that surround alveoli to allow for gas exchange to occur. |
Pleurae | The double layer serous membrane that covers each lung. These layers reduce friction between the lungs and the thoracic cavity. |
Surfactant | A lipoprotein layer that reduced surface tension to ensure that lungs can return to their normal shape. |