Chapter 7 Flashcards
respiratory system (function)
responsible for the exchange of oxygen and carbon dioxide
ventilation
breathing; the transportation of oxygen-enriched air from the atmosphere to the lungs and the elimination of carbon dioxide waste from the lungs to the atmosphere
homeostasis
maintenance of a stable internal environment of the body
carbon dioxide (CO2)
tasteless, colorless, odorless gas produced by body cells during metabolism
cartilage
tough, elastic connective tissue that is more rigid than ligaments but less dense than bone
cilia
minute, hairlike structures that extend from the surface of the cell
diffuse
to move or spread out a substance at random, rather than by chemical reaction or application of external forces
oxygen (O2)
tasteless, odorless, colorless gas essential for human respiration
serous membrane
thin layer of tissue that covers internal body cavities and secretes a fluid that keeps the membrane moist; also called serosa
nasal cavity
a chamber lined with mucous membranes and cilia; the air is filtered, heated, and moistened to prepare if for its journey to the lungs
nasal septum
divides the nasal cavity into a right and left; made of cartilage
olfactory neurons
receptors for the sense of smell; covered in a layer of mucus and located high in they nasal cavity
pharynx
throat; passageway for food and air
nasopharynx
posterior to the nose
oropharynx
posterior to the mouth
laryngopharynx
superior to the larynx
adenoids (pharyngeal tonsils)
collections of lymphoid tissue within the nasopharynx
palatine tonsils (tonsils)
protect the opening to the respiratory tract from microscopic organisms that may attempt entry by this route; located in the oropharynx
larynx (voice box)
contains the structures that make vocal sounds possible
epiglottis
a leaf-shaped structure on top of the larynx that seals off the air passage to the lungs during swallowing
trachea (windpipe)
composed of smooth muscle embedded with C-shaped rings of cartilage which provides rigidity to keep the air passage open; divides into two branches called bronchi
bronchi
split off of trachea and lead to each lung (right and left)
mucous membrane (mucosa)
makes up the inner walls of the trachea and bronchi and is embedded with cilia
bronchioles
smaller branches of the bronchus
alveoli
tiny air sacs at the ends of bronchioles that expand and contract with inflow and outflow of air
pulmonary capillaries
carries deoxygenated blood into the lungs and brings oxygenated blood out of the lungs (carbon dioxide diffuses into alveolar spaces and oxygen diffuses into the blood from the alveoli)
mediastinum
the space between the right and left lungs; contains the heart, aorta, esophagus, and bronchi
pleura
covers the loves of the lungs and fold over to line the walls of the thoracic cavity
visceral pleura
the membrane lying closest to the lung
parietal pleura
the membrane that lines the thoracic cavity
pleural cavity
the space between the visceral and parietal pleura; contains a small amount of lubricating fluid that reduces friction between the membranes
diaphragm
a large muscular partition that assists in changing the volume of the thoracic cavity to produce the needed pressure differentiation for ventilation
inspiration
the pressure decreases in the chest and draws air into the lungs
expiration
the pressure increases in the chest and air leaves the lungs
pulmonary respiration (general)
the process by which O2 is taken from the air and carried to body cells for their use, and CO2 and water, the waste products generated by these cells, are carried to the lungs and returned to the environment
pulmonary ventilation
a largely involuntary action the moves air into and out of the lungs in response to changes in blood O2 and CO2 levels and nervous stimulation of the diaphragm and intercostal muscles
external respiration
the exchange of O2 and CO2 between the alveoli and the blood in the pulmonary capillaries
transport of respiratory gases
the movement of O2 to body cells and CO2 to the lungs by means of the cardiovascular system
internal respiration
the exchange of O2 and CO2 between body cells and the blood in systemic capillaries
nas/o
nose
rhin/o
nose
sept/o
septum
sinus/o
sinus, cavity
pharyng/o
pharynx (throat)
adenoid/o
adenoids
tonsill/o
tonsils
epiglott/o
epiglottis
laryng/o
larynx (voice box)
trache/o
trachea (windpipe)
bronchi/o
bronchus
bronch/o
bronchus
bronchiol/o
bronchiole
alveol/o
alveolus; air sac
pleur/o
pleura
pneum/o
air; lung
pneumon/o
air; lung
pulmon/o
lung
anthrac/o
coal, coal dust
atel/o
incomplete; imperfect
coni/o
dust
cyan/o
blue
lob/o
lobe
orth/o
straight
ox/o
oxygen (O2)
pector/o
chest
steth/o
chest
thorac/o
chest
phren/o
diaphragm; mind
spir/o
breathe
-capnia
carbon dioxide (CO2)
-osmia
smell
-phonia
voice
-pnea
breathing
-ptysis
spitting
-thorax
chest
brady-
slow
dys-
bad; painful; difficult
eu-
good, normal
tachy-
rapid
pulmonology
the medical specialty concerned with disorders of the respiratory system
pulmonologist
the physician who treats disorders of the respiratory system