Chapter 7- Respiratory System Flashcards
breathing (ventilation)
lungs and airways transport oxygen-enriched air from the atmosphere to the lungs and carry waste CO2 from the lungs to the atmosphere
carbon dioxide
tasteless, colorless, odorless gas produced by body cells during metabolism
cartilage
touch, elastic connective tissue that is more rigid than ligaments but less dense than bone
cilia
minute, hairlike structures that extend from the surface of a cell
diffuse
to move or spread out substance at random, rather than by chemical reaction or application
oxygen
tasteless, odorless, colorless gas essential for human respiration
pH
symbol that indicates the degree of acidity or alkalinity of a substance
serous membrane
thin layer of tissue that covers internal body cavities and secretes a fluid that keeps membrane moist; aka serosa
nasal cavity
a chamber lined with mucous membranes and tiny hairs known as cilia; divided into a right and left side by a vertical partition of cartilage known as the nasal spectum
olfactory neurons
receptors for the sense of smell
pharynx
a muscular tube that serves as a passageway for food and air
pharynx consists of
nasopharynx
oropharynx
laryngopharynx
nasopharynx
posterior to the nose
oropharynx
posterior to the mouth
laryngopharynx
superior to the larynx
within nasopharynx is a collection of
adenoids; lymphoid tissue
within oropharynx is
palatine tonsils; protect the opening to the respiratory tract from microscopic organisms
larynx (voice box)
contains the structures that make vocal sounds possible
epiglottis
leaf-shaped structure on top of the larynx, seals off the air passage to lungs during swallowing
trachea (wind-pipe)
composed of smooth muscle embedded with c-shaped rings of cartilage, keep air passage open
trachea divides into two branches
bronchi; one branch leads to right lung, other leads to left lung
bronchus divides into smaller branches known as
bronchioles
alveoli
tiny air sacs at the end of bronchioldes
pulmonary capillaries
lie next to the thin tissue membranes of the alveoli