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fespiratory system

The respiratory system

QuestionAnswer
repiratory system Consists of lungs and air passages.
Nose has two openings called nostrils or nares through which air enters
nasal septum a wall of cartlidge that divesds the nose into two hollow spaces called nasal cavitites
nasal cavaties are lined with a mucous membrane and have a ricjh blood supply
cilia tiny, hairlike structures that filtar inhaled air to trap dust and other particles
Sinuses are cavities in the skull that surrond the nasel area
pharynx (throat) lies direrctly behind the nasal cavitites as air leaves the nose it enters the pharynx
Larynx (voice box) lies between the pharynx and trachea. has nine layers of cartlidge
epiglottis leaflike piece of cartlidge closes the opening of the larynx during swallowing. prevents foods and liquids from entering the respiratory tract
trachea (windpipe) is a tube extending from the larynx to the center of the chest. carries air between the pharynx and the bronchi
bronchi near the center of the chest a right bronchus and a left carries air from the trachea to the lunghs
bronchioles smallest branches of of the two bronchi
alveoli adult lungs have 500 million alveoli made up of one layer of squamous epithelial tissue and contain a rich network of blood capillaries.
lungs divisions of of the bronchi and the aveoli are found
pleura encloses the lungs
ventilation is the process of breathing
inspiration is the process of breathing in air
expiration is the process of exhaling air
respiration the process of inspiration and ventialtion
external respiration is the exchange of oxygen and carbon dioxide between the lungs and blood stream
internal respiration the exchange of carbon dioxide and oxygen between the tissue cells and the bloodstream
cellular respirtation when the cells use the oxygen and nutrientss to prodcue energy water and carbon dioxide
Created by: marklance01
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