Respiratory System – consists of specific organs responsible for supplying the blood with oxygen and
expelling carbon dioxide.
Trachea or Windpipe – made up of rings of cartilage making it flexible enough to keep the passageway open for air; Its cilia push mucus and dust particles and bacteria toward the throat.
Bronchi – two tubes that conducts air into the lungs: the left bronchus which is narrower, longer and less straight than the right bronchus.
Bronchioles – tinier branches of the main bronchi going to the air sacs
Alveoli or air sacs – thin-walled bulbs referred to as the sites of respiration
Lungs – main organs of the respiratory system which are large, elastic, spongy sacs.
pleura is a thin membrane covering the lungs
Diaphragm – a dome-shaped muscle separating the chest from the abdomen that aids in respiration
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