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7th-8th science

respiratory system

TermDefinition
respiratory system exchange oxygen from the air with C02 from the blood
nasal cavity generally the first entrance of air into the chest cavity
warmed and filtered two things which happen to the air upon entering the nasal cavity
mucous membrane secretes sticky mucus that traps dust particles and other foreign substances found in the air
pharynx and larynx the passageway of air after leaving the nasal cavity
trachea the windpipe
right and left bronchi what the trachea branches into
bronchus singular for bronchi
bronchi allows the air to enter the two lungs
thoracic cavity houses the two lungs
right lung slightly larger than the left
three lobes associated with the right lung only
two lobes associated with the left lung only
pleura the slippery membrane covering the lungs
16 breaths per minute average number of breaths for most normal humans
number of alveoli consists of about 300 million of these tiny air sacs
function of the alveoli allow for the exchange of oxygen and carbon dioxide between your blood and the air
what happens when you inhale? air enters the aveoli
oxygen's movement from the alveoli into the surrounding blood capillaries and carried by the blood to every part of the body
carbon dioxide movement from the body cells is released from the blood into the alveoli and travels up your respiratory tubes as you exhale
diaphram the muscle that helps you breath by contracting to create more space in your thoracic cavity
phrenic nerve signals the diaphragm muscle to contract
Created by: rufus webster
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