Chapter 3: Upper Respiratory Trac Flashcards
What are the two tracts that the Respiratory System is divided into?
The Upper Respiratory Tract and Lower Respiratory Tract.
What are the structures of the Upper Respiratory Tract?
Nasal Cavity, Olfactory Receptors, Paranasal Sinuses, Pharynx, Larynx and Trachea.
Air enters the nasal cavity through two openings called?
The nostrils and nares.
The nasal cavity lines with what?
With a Mucous membrane.
What provides the mucus that lines the mucous membrane?
A physical barrier against an invasion by pathogens (harmful microorganisms), dust and pollen.
Inhaled air is warmed and moistened by what?
By the tissue that lines the nasal cavity.
How many receptor cells for smell in the extreme upper region of the nasal cavity (olfactory region) does humans have?
12 million receptor cells for smell.
How many receptor cells does a dog has?
4 billion receptor cells. They can be trained to sniff drugs, explosives and dead bodies.
What are Paranasal Sinuses?
Are air-filled cavities that surround the nasal cavity.
What are the functions of Paranasal Sinuses?
Reduce the weight of the skull, produce mucus and influences voice quality by acting as resonating chambers.
What are the four Paranasal Sinuses?
Maxillary, Ethmoid, Sphenoid and Frontal.
Pharynx is commonly known as?
Throat.
What is the Pharynx?
A passageway that serves the respiratory and digestive systems.
Pharynx receives air after it passes through what?
Through the nose or mouth.
Larynx is commonly known as?
Voice box.
