THE RESPIRATORY SYSTEM Flashcards
Exchange of gasses takes place within the lungs in the __________
Alveoli
Organs of the respiratory system
Nose, Pharynx, Larynx, Trachea, Bronchi, Lungs-alveoli
Where are olfactory receptors located?
Mucosa on the superior surface
Nasal cavity is lined with?
Respiratory mucosa
Respiratory mucosa functions:
Moistens air, Traps incoming foreign particles
Lateral walls of nasal cavity have projections called ________________
Conchae
Functions of conchae:
Increases surface area, Increases air turbulence within the nasal cavity
What separates nasal cavity from oral cavity?
Palate
Anterior hard palate=
Bone
Posterior soft palate
Muscle
Cavities within bones surrounding the nasal cavity
Paranasal sinuses
Functions of the sinuses
Lighten the skull, Act as resonance chambers for speech, Produce mucus that drains into the nasal cavity
Paranasal sinuses:
Frontal sinuses, Ethmoid sinuses, Sphenoid sinuses, Maxillary sinuses
Muscular passage from nasal cavity to larynx
Pharynx (throat)
Three regions of the pharynx
Nasopharynx, Oropharynx, Laryngopharynx
Superior region behind nasal cavity
Nasopharynx
Middle region behind mouth
Oropharynx
Inferior region attached to larynx
Laryngopharynx
Common passageways for air and food
Oropharynx, Laryngopharynx
Where do auditory tubes enter?
nasopharynx
Tonsils of the pharynx:
Pharyngeal tonsils, Palatine tonsils, Lingual tonsils
Routes air and food into proper channels, which also plays a role in speech
LARYNX
Made of eight rigid hyaline cartilages and a spoon-shaped flap of elastic cartilage (epiglottis
Larynx
Largest hyaline cartilage, which protrudes anteriorly (Adam’s apple)
Thyroid cartilage
Superior opening of the larynx
Epiglottis
Routes food to the larynx and air toward the trachea
Epiglottis
Vibrate with expelled air to create sound (speech)
Vocal cords
Opening between vocal cords
Glottis
Connects larynx with bronchi
Trachea
Trachea is lined with _______________
Ciliated mucosa
Walls are reinforced with C-shaped hyaline cartilage
Trachea
Formed by division of the trachea
Primary bronchi
Primary bronchi enter the lung at the ________________
hilus (medial depression)
Occupy most of the thoracic cavity
LUNGS
Left lung - _____ lobes
two
Right lung - ______ lobes
three