Respiratory System
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It is the process of breathing and movement of gas in and out of the lungs
Ventilation
Ventilation with distribution and exchange of gases
Respiration
It is the exchange of gases in the bloodstream
External Respiration
Exchange of gases between blood and tissue
Internal Respiration
The respiratory System ____ and ______ air before it enters the _____.
cleans, moistens, lungs
What are the functions of the respiratory system?
Ventilation Respiration Clean and moistens inhaled air for lungs Olfaction Provides air for phonation Maintain pH balance of the body
What is the path of air?
nares -> nasal vestibules -> nasal cavity -> choanae -> pharynx -> larynx -> trachea
Non-haired part consisting of tough keratinized squamous epithelium
Nasal planum
Opening of the nose inferior to the nasal planum. Serves as the entry and exit point of air
Nostrils/External nares
Cartilaginous structure between the external nares
Philtrum
Composed of squamous epithelial tissues. Most rostral part of the nasal cavity Provides moisture to the air that enters
Nasal vestibule
Divides the nasal cavity
Nasal bone
Smaller bones projecting laterally in the nasal cavity. Filters out dust. Warms and humidify air
Nasal turbinate bones
Divided in three regions— frontal, sphenoidal, maxillary
Sinuses
what are the three sinuses? Function?
frontal, sphenoidal, maxillary. Moistens air before it enters the lower respiratory tract
Passageway of air that connect the nasal cavity with the nasopharynx
Nasal choanae
Extends from a line through the posterior edge of the hard palate to a line through the posterior boundary of the larynx
Pharynx
Three regions of the pharynx
Nasopharynx, Oropharynx, Laryngopharynx
Region of the pharynx posterior to nasal cavity, dorsal to the soft palate; exclusively respiratory
Nasopharynx
Region of the pharynx separated with nasopharynx by the soft palate, ventral to the soft palate; exclusively digestive
Oropharynx
Region of the pharynx extends from the hyoid bone to the nasopharynx. Papunta sa windpipe at voicebox
Laryngopharynx
Passageway of air, food, and water
Pharynx
Passageway of air, food, and water
Pharynx
A cartilaginous structure that is superior to the trachea
Epiglottis