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Chapter 15
The Respiratory System
89
Biology
10th Grade
03/04/2007

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Term
what does the larynx consist of?
Definition
an outer casing of 9 cartilages
Term
what connects the 9 cartilages of the larynx?
Definition
muscles and ligaments
Term
what is the upper pair of vocal cords called
Definition
the false vocal cords
Term
what is another name for the false vocal cords
Definition
vestibular folds
Term
what is the lower pair of vocal cords called
Definition
true vocal cords
Term
what is another name for the true vocal cords
Definition
vocal folds
Term
what controls the pitch of the voice
Definition
changing tension on the vocal cords
Term
what controls the loudness of the voice
Definition
the increase or decrease of the force of air vibrating the vocal cords
Term
during normal breathing how is the glottis?
Definition
a triangular slit
Term
what happens during swallowing?
Definition
the false vocal cords and epiglottis close off the glottis
Term
what causes sound waves?
Definition
air rushing through the voice box and the vibration of the vocal cords
Term
where does the air go after it reaches the larynx
Definition
into the thoracic cavity through the trachea
Term
what is inflammation of the mucus epithelium of the true vocal cords called
Definition
laryngitis
Term
what extends downward to the esophagus and into the thoracic cavity
Definition
the trachea
Term
what does the trachea split into
Definition
the left and right bronchi
Term
what is the inner wall of the trachea lined with
Definition
ciliated mucous membrane
Term
what do goblet cells do
Definition
trap incoming particles
Term
what are the walls of the trachea made up of
Definition
c-shaped rings
Term
what are c-shaped rings made up of
Definition
tough flexible cartilage
Term
what do c-shaped rings do
Definition
-protect the trachea
-make trachea flexible
-keep trachea from collapsing or overexpanding
Term
what do the cells that line the trachea do
Definition
creat mucus
Term
what does mucus do
Definition
helps trap things in the air like dust and microorganisms
Term
what does the bronchial tree consist of
Definition
branched tubes that lead form the trachea to the alveoli
Term
what does the primary bronchi divide into
Definition
the secondary bronchi
Term
how many secondary bronchi are found in the left lung
Definition
two
Term
how many secondary bronchi are found in the right lung
Definition
three
Term
what do the secondary bronchi do
Definition
conduct air to each lobe
Term
what does the secondary bronchi branch into
Definition
the tertiary bronchi
Term
what does the tertiary bronchi extend into
Definition
the lobules of the lung
Term
what does the bronchial tree eventually give rise to?
Definition
the bronchioles
Term
what do the bronchioles eventually give rise to?
Definition
the terminal bronchioles
Term
what do the terminal bronchioles eventually divide into
Definition
the respiratory bronchioles
Term
what does each respiratory bronchiole divide into
Definition
the alveolar duct
Term
what does the alveolar duct end as
Definition
a cluster of air sacs called alveoli
Term
cluster of air sacs at the end of each alveolar duct
Definition
alveoli
Term
where does gas exchange between the blood and air occur
Definition
the thin epithelial cells of the alveoli
Term
the principal organs of respiration
Definition
lungs
Term
what are the lungs seperated by
Definition
the mediastinum
Term
what are the lungs enclosed by
Definition
the diaphragm and thoracic cage
Term
place where bronchi, vessels, and nerves enter each lung
Definition
hilum
Term
what are the three lobes of the right lung called
Definition
-superior
-middle LOBES
-inferior
Term
what are the two lobes of the left lung called
Definition
-superior
-inferior LOBES
Term
what is each lobe composed of
Definition
lobules
Term
what do lobules contain
Definition
air passages, alveoli, nerves, blood vessels, lymphatic vessels, and connective tissues
Term
what is each lung surrounded by
Definition
pleural cavity
Term
what is each pleural cavity lined with
Definition
pleura
Term
what does the visceral pleura fold into
Definition
the parietal pleura
Term
what is the visceral pleura attached to
Definition
the lung
Term
what does the parietal pleura do
Definition
line the thoracic cavity
Term
what lubricates the pleura cavity
Definition
serous fluid
Term
proces of moving air into and out of the lungs
Definition
ventilation
Term
2 phases of ventilation
Definition
inspiration
expiration
Term
movement of air into the lungs
Definition
inspiration
Term
force that movies air into the lungs
Definition
atmospheric pressure
Term
what happens when the pressure on the inside of the lungs decreases
Definition
higher pressure air flows in from the outside
Term
how is air pressure inside the lungs decreased
Definition
by increasing the size of the thoracic cavity
Term
what muscles are involved in expanding the thoracic cavity
Definition
diaphragm and external intercostal muscles
Term
what does the surfactant do
Definition
keeps the alveoli from sticking to each other so they do not collapse when internal air pressure is low
Term
movement of air out of the lungs
Definition
expiration
Term
what are the forces of expiration due to
Definition
-the elastic recoil of lung and muscle tissues
- the surface tension within the alveoli
Term
what is forced expiration aided by
Definition
the thoracic and abdominal wall muscles
Term
where is the diaphragm located
Definition
along the bottom of the ribcage
Term
what does the diaphragm do
Definition
seperates the thoracic cavity from the abdominal cavity
Term
where do the intercostal muscles lie?
Definition
between the ribs
Term
where is the diaphragm befor inspiration
Definition
curved upward into the chest
Term
what happens when the diaphragm moves down during inspiration
Definition
-volume of the thoracic cavity increases
-the air pressure inside the lungs decreases
Term
what happens when the diaphragm relaxes after inspiration
Definition
the volume of the air in the thoracic cavity decreases
Term
what is the major muscle of inspiration during quiet breathing
Definition
the diaphragm
Term
what two reasons do the lungs collapse
Definition
-elastic recoil in the lungs
-surface tension of the fluid thal lines the alveoli
Term
the factors that keep the lungs from collapsing
Definition
-surfactant
-tendency of visceral pleurae to adhere to parietal pleura
Term
mixture of lipoprotein molecules produced by the secretory cells of the alveoli epithelium
Definition
surfactant
Term
process of measuring voluems of air that move into and out of the respiratory system
Definition
spriometry
Term
device used to measure the pulmonary volumes
Definition
spriometer
Term
four pulmonary volumes
Definition
-tidal
-inspiratory reserve
-expiratory reserve VOLUME
-residual
Term
volume of air inspired or expired during quiet breathing
Definition
tidal volume
Term
amount of air that can be inspired forcefully after inspiration of the normal tidal volume
Definition
inspiratory reserve volume
Term
amount of air that can be expired forcefully after expiration of the normal tidal volume
Definition
expiratory reserve volume
Term
volume of air still remaining in the respiratory passages and lungs after a maximum expiration
Definition
residual volume
Term
sum of two or more pulmonary volumes
Definition
pulmonary capacity
Term
sum of the inspiratory reserve, tidal, and expiratory volume
Definition
pulmonary capacity
Term
maximum volume of air a person can expel after a max. inspiration
Definition
pulmonary capacity
Term
vital capacity plus residual volume
Definition
total lung capacity
Term
tidal volume plus the inspiratory reserve volume
Definition
inspiratory capacity
Term
amount of air a pereson can inspire after a normal expiration
Definition
inspiratory capacity
Term
expiratory reserve volume plus the residual volume
Definition
functional residual capacity
Term
amount of air remaining in the lungs at the end of a normal expiration
Definition
functional residual capacity
Term
rate at which lung volume changes during direct measurement of the vital capacity
Definition
forced expiratory vital capacity
Term
test in which person inspires max. and exhales max. as rapidly as possible
Definition
forced expiratory vital capacity
Term
what does the spirometer record
Definition
volume of air expired per second
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