Week 2 Deck Flashcards
(121 cards)
External Respiration
Exchange of air in lung capillaries:
- Oxygen inhaled into the air sacs of the lungs
- Immediately passes into capillaries
- Carbon dioxide passes from capillaries into air
sacs, to be exhaled
Internal Respiration
Exchange of gases in the
cells:
- Occurs simultaneously between cells and
capillaries
- Oxygen passes out of the bloodstream into the
tissues
- Carbon dioxide passes out of tissues back into
the bloodstream to travel to the lungs
Mediastinum
Middle of chest where trachea
divides into two branches
Bronchi
Each leads to a separate lung
Lungs
Lobes are not mirror images
Hilum
Blood vessels, nerves, lymphatic tissue,
and bronchial tubes enter and exit
Adenoids
Lymphatic tissue in the nasopharynx;
pharyngeal tonsils
Alveolus
Air sac in the lung
Apex of the lung
Tip or uppermost portion of the lung
Base of the lung
The lower portion of the lung
Bronchioles
The smallest branches of the bronchi
Bronchus (plural:
bronchi)
The branch of the trachea (windpipe) that is a
passageway into the lung; bronchial tube
carbon dioxide
Gas produced by body cells when oxygen and
carbon atoms from food combine; exhaled
through the lungs
cilia
Thin hairs attached to mucous membrane
epithelium lining the respiratory tract
diaphragm
Muscle separating the chest and abdomen;
contracts to pull air into lungs; relaxes to push
air out
epiglottis
Lid-like piece of cartilage that covers the
larynx; keeps food from entering the larynx
and trachea during swallowing
expiration
Breathing out (exhalation)
glottis
Slit-like opening to the larynx
hilum (of lung)
Midline region where the bronchi, blood
vessels, and nerves enter and exit the lungs
inspiration
Breathing in (inhalation)
larynx
Voice box; contains the vocal cords
lobe
Division of a lung
mediastinum
The region between lungs in the chest cavity;
contains the trachea, heart, lymph nodes,
aorta, esophagus, and bronchial tubes
nares
Openings through the nose carrying air into
the nasal cavities
