Chapter 22: Respiratory System Lecture Outline Flashcards
Consists of a system of tubes that delivers air to the lungs
Respiratory system
Which two systems work together to deliver oxygen to the tissues and remove carbon dioxide?
The respiratory and cardiovascular systems
Why do we need O2?
Mitochondria; ATP - need oxygen to make adenosine triphosphate
Why are we producing CO2?
Byproduct as ATP is being produced
Functions of respiration include:
Gas exchange, communication, olfaction, acid-base balance, helps produce angiotensin II, produce pressure gradients to help blood and lymph flow, filters small clots, and valsalva maneuver assists in urination, childbirth, and defecation
The conducting division of the respiratory system includes:
- those passages that serve only for airflow
- no gas exchange
- nasal cavity through terminal bronchioles
The respiratory division of the respiratory system consists of:
alveoli and other gas exchange regions
The upper respiratory tract is located in the
head and neck
The lower respiratory tract is located in the
organs of the thorax
Functions of the nose:
- warms, cleanses, and humidifies inhaled air
- detects odors
- serves as a resonating chamber
The nose extends from
nostrils (nares) to posterior nasal apertures (choanae)
Facial part is shaped by bone and what cartilage?
The nose
hyaline cartilage
Divides the nasal cavity:
nasal septum
The nasal conchae include the:
superior, middle, and inferior
Narrow air passage beneath each conchae:
meatus
Meatus characteristics:
- narrowness and turbulence ensure that most air contacts mucous membranes
- cleans, warms, and moistens the air
What lines most of the nasal cavity?
Respiratory epithelium
Cells that secrete mucus and cilia propel the mucus posteriorly toward the pharynx
Goblet cells
Three regions of the pharynx:
- nasopharynx
- oropharynx
- laryngopharynx
Region of the pharynx that is posterior to nasal apertures and above the soft palate; receives auditory tubes and contains pharyngeal tonsil
nasopharynx
Region of the pharynx spaced between the soft palate and epiglottis; contains palatine tonsils and lingual tonsils
oropharynx
Region of the pharynx from the epiglottis to the cricoid cartilage; esophagus begins at that point
laryngopharynx
Which regions of the pharynx are shared with the digestive system?
- oropharynx
- laryngopharynx
Region of the pharynx that passes only air and is lined by pseudostratified columnar epithelium
nasopharynx
Regions of the pharynx that pass air, food, and drink, and are lined by stratified squamous epithelium
- oropharynx
- laryngopharynx
Muscles of the pharynx assist in:
swallowing and speech
this is where the hyoid bone comes in
AKA the voicebox; cartilaginous chamber about 4cm (1.5 in) long
Larynx
Primary functions of the larynx are to:
keep food and drink out of the airway and sound production