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BIO 116 RESPIRATORY SYSTEM

STUDY
PLAY
Pharynx
the throat
Larynx
voicebox. sits above trachea
Vocal Chords
pair of elastic ligaments on either side of the larynx wall. air forced between them causes chords to vibrate=sound.
Glottis
gap between vocal chords that opens to larynx
Bronchi (Bronchus)
tubelike branchings of the trachea that lead to lungs
Bronchitis
Condition where mucus accumulates airways and particles get trapped.
Lungs
cone shaped organs seperated from eachother by the heart
left lung has__ lobes
2
Right lung has __ lobes
3
Intercostal Muscles
muscle between the ribs which help ribs move when lungs expand/contract
Diaphram
thin sheet of muscle that divides the thoracic and abdominal cavaties, rests against lower lungs and aids in inhaling/exhaling
Pleurae
thin double membrane sacs with fluid between layers. encloses the lungs.
Bronchioles
bronchi narrow and branch off forming "trees". inside each lung, narrow branching pathways.
Alveoli (Alveolus)
tiny air sacs. gas exhanged by diffusion here through blood capillaries. Millions of Alveoli in each lung.
respiration
when refeering to the respiratory system. process that delivers oxygen to cells of body and removes carbon dioxide waste.
Respiratory Surface
a thin, moist epithelium. gases must cross it to enter/leave the body. gases must be dissolved in fluid to get across
Inspiration/Inhalation
breathin in
Expiration/Exhalation
breath out
Respiratory Cycle
one inhalation + one expiration= one respiratory cycle
Pneumothorax
collapsed lung. when air enters the pleural sacs. lungs cant expand normally.
Tidal Volume
normal breath, 1/2 liter of air enters/leaves.
Vital Capacity
maximum amount of air that can be breathed out after you inhale as deeply as you can.
Residual Volume
amount of air that is always in lungs. they never empty completely.
External Respiration
movement of oxygen from alveoli into blood to get through heart and out to tissues
Internal Respiration
oxygen moves out from blood supply into tissues and carbon dioxide is taken from tissues out throuh blood supply
Respiratory Membrane
two layer membrane between the walls of lung capillaries and alveoli; blood gases diffuse across it.
DPG
...
Carbaminohemoglobin
...
Medulla/Pons
located at brainstem, control center for respiration
Respiratory Center
...