respiratory system

• Nose - external nares
• nasal septum - divides the nose into two halves
• paranasal sinuses - air is warmed
• cilia - filters out foreign bodies
• pharynx - throat
• pharynx - common passageway for food and air
• two passageways for pharynx - esophagus and trachea
• epiglottis - flap of tissue that encloses the entrance to the rest of respiratory system
• bronchi - two tubes branching off from trachea into lungs
• trachea - windpipe, cartilage rings support it
• alveoli - tiny sacs at end of bronchioles where gas exchange occurs
• diaphragm - muscle separating chest cavity from abdominal cavity, contracts when we breathe in
• nasopharynx - pharyngeal tonsils (adenoids) aid in body's immune defense
• oropharynx - palatine tonsils which aid in the body's immune system
• laryngopharynx / hypopharynx - divides esophagus and larynx
• larynx - also known as voicebox
• trachea - also known as windpipe
• adam's apple - connects two pieces
• trachea - vacuum cleaner of nose and the main passageway to the lungs
• lungs - sponge-like organs located in the chest cavity
• alveoli - tiny air sacs where gas exchange occurs between blood and air
• mediastinum - separates the lungs from each other
• left lung is smaller than the right lung
• visceral pleura - inner
• parietal pleura - outer
• bronchi - also known as bronchial tubes
• bronchi - connects trachea to the lungs
• bronhioles - finer subdivisions, connects to alveoli
• alveoli inflate during inhalation
• alveoli deflate during exhalation
• breathing - phase of respiration
• respiration - overall exchanges of gases (body gets oxygen and get rids of carbon dioxide)
• external respiration - exchange of oxygen and carbon dioxide between the air and the blood within the lungs
• internal respiration - exchange between the blood and body cells
• erythrocyte - red blood cells
• cellular respiration - oxygen to breakdown food, producing ATP in cells, carbon dioxide as waste product
• integumentary - exchange that occurs through skin
• gills - underwater
• tracheal systems - used by insects
• lungs - land animals