Chapter 7 Flashcards
respiratory system
respiratory system
delivers air to lungs, convey oxygen from inhaled air to blood for delivery to body cells, expel waste products returned to lungs by blood, produce airflow through larynx that makes speech possible
upper respiratory tract
nose, mouth, pharynx, epiglottis, larynx, and trachea
lower respiratory tract
bronchial tree and lungs, located within and protected by thoracic cavity
nose
air enters body through and passes through nasal cavity
nostrils
external openings of nose
nasal cavity
interior portion of nose
nasal septum
wall of cartilage that divides nose into tow equal sections
septum
wall that separates two chambers
cilia
thin hair located just inside nostrils, filters incoming air to remove debris
mucous membrane
line the nose
mucus
slippery secretion produced by mucous membrane that protects and lubricates tissues; moisten, warm and filter incoming air
olfactory receptors
nerve endings that act as receptors for the sense of smell, also important for taste
tonsils
palatine tonsils; back of mouth, part of lymphatic system, protects body from infection
adenoids
nasopharyngeal tonsils; behind nose and roof of mouth
paranasal sinuses
air-filled, mucous membrane lines cavities in bones of skull, make bones lighter, help produce sound by giving resonance to voice and produce mucus to provide lubrication for tissues of nasal cavity
para-
near
nas/o
nose
frontal sinuses
in frontal bone just above eyebrows, infection here causes pain
sphenoid sinuses
in sphenoid bone behind eye and under pituitary gland, infection here can cause vision damage
maxillary sinuses
largest of paranasal; in maxillary bones under eyes, infection here causes pain in posterior maxillary teeth
ethmoid sinuses
in ethmoid bones between nose and eyes, irregular shaped air cells that are separated from orbital cavity by only a thin layer of bone
pharynx
throat; receives air after it passes through nose or mouth
nasopharynx
posterior to nasal cavity and continues downward to behind the mouth, only respiratory system
oropharynx
visible when looking into mouth, shared by respiratory and defective systems, carries air, food and fluid