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The Respiratory System
Biology 1 Honors
25
Biology
10th Grade
04/06/2011

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Term
To obtain oxygen and remove carbon dioxide; filter air, produce sounds, sense of smell, and regualtion of blood pH; and repiration
Definition
The Respiratory's main functions are...
Term
breathing
Definition
physical process where you inhale oxygen and exhale carbon dioxide
Term
respiration
Definition
chemical process of gas exchange b/t the atmosphere and body cells
Term
external respiration
Definition
involves the exchange of oxygen or carbon dioxide b/t air and blood
Term
ventilation
Definition
movement of air into lungs
Term
internal respiration
Definition
gas exchange b/t the blood and body cells
Term
Lungs, pharynx, larynx, epiglottis, trachea, bronchi, and alveoli
Definition
Name the components of the Respiratory system...
Term
lungs
Definition
soft, spongy organs in the thoraic cavity
Term
pharynx
Definition
throat
Term
larynx
Definition
sound production; "voice box"
Term
epiglottis
Definition
covers the entrance to the trachea to prevent food from getting into the air passages
Term
trachea
Definition
windpipe tube that connects larynx to the lungs
Term
bronchi (bronchus singular)
Definition
passage of airway that conducts air into lungs
Term
alveoli
Definition
the primary gas exchange units of the lung
Term
Air flows into nose or mouth, through nasal cavity; pharynx; epiglottis; larynx; trachea; bronchi & bronchioles; lungs; alveolar ducts; alveolar sacs; alveoli, oxygen diffused into bloodstream
Definition
What is the path air takes from the enviorment to the lungs to the bloodstream?
Term
The nasal cavity, trachea, and bronchi are lined with cilia and mucus that beat upward in the direction of the throat causing foreign matter to be driven there and expelled by swallowing, sneezing, or coughing.
Definition
How does the body make sure only clean air gets to the lungs?
Term
alveoli
Definition
thin walled sacs, surrounded by capillary networks, that allow gas exchange of oxygen and carbon dioxide by diffusion
Term
oxygen; oxygenated
Definition
___________ from the air diffuses into the blood vessels surrounding the alveoli and this "___________" blood is pumped by the heart to the body cells.
Term
carbon dioxide
Definition
a waste product that is picked from cells by blood (more specifically, hemoglobin in blood) and carried to the lungs where it diffuses from the blood into alveoli to be exhaled.
Term
blood
Definition
When CD is removed, oxygen diffuses from the air in the alveoli into the _____ making it oxygenated (rich in oxygen)
Term
diaphragm
Definition
The action of your ____________ and the muscles b/t your ribs enable you to breathe in and out.
Term
relaxed; decreasing
Definition
When _________, your diaphragm is positioned in a dome shape beneath your lungs, _________ the volume of your chest cavity and forcing air out of the lungs.
Term
contracting; enlarging
Definition
When __________, the diaphragm flattens, __________ the chest cavity anf drawing air into the lungs.
Term
medulla oblongata
Definition
breathing is an involuntary process controlled by internal feed mechanism that sends signals to the __________ _______ about blood chemistry.
Term
more nerve signals being sent to your rib muscles and diaphragm, which causes them to contract and you to inhale
Definition
Higher levels of CD in your body =
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