Flashcards in Ch 23 Respiratory Deck (130)
What is respiration?
Continuous exchange of oxygen and carbon dioxide - between atmosphere and body cells
What systems contribute to respiration?
Respiratory, Skeletal, Muscular, Nervous, Cardiovascular
How does the Respiratory System contribute to respiration?
Responsible for exchange of gases between atmosphere and lungs
How do the Skeletal and Muscular Systems contribute to respiration?
Alter the volume and pressure in thoracic cavity to facilitate movement of air in/out of lungs
How does the Nervous System contribute to respiration?
stimulates and coordinates contraction of muscles for breathing
How does the Cardiovascular System contribute to respiration?
Transports Oxygen and Carbon Dioxide between lungs and cells
What are the 4 functions of respiratory system?
Site for exchange of gases
Detection of odors
What are the two divisions of the respiratory system?
What are each of their 2 corresponding divisions?
-Upper Respiratory Tract
- Lower Respiratory Tract
- Respiratory Zone
what structures belong where?
Upper respiratory tract - 3
Lower Respiratory tract - 6
what structures belong where?
- passageways that transport or conduct air
- from nose to the end of terminal bronchioles
- Structures that participate in gas exchange with the blood
- respiratory bronchioles, alveolar ducts, alveoli
Describe mucosal lining of the respiratory passageway.
- Gets progressively thinner from the nasal cavity to alveoli
- Mucous membrane consists of: (mucus on top) epithelium, basement membrane & lamina propia
-contains goblet cells
What is the pathway of air from nose to alveoli? 8
Nose/Nasal Cavity --> Pharynx --> Trachea --> Main Bronchi --> Lobar Bronchi --> Segmental Bronchi --> Bronchioles (ending in terminal bronchioles) --> Alveoli (site of gas exchange)
What is the nose composed of?
bone, hyaline cartilage, dense irregular connective tissue, covered with skin
What forms the bridge of nose?
paired nasal bones
Describe the supporting bridge of the nose
1 pair of lateral cartilages (mid area of nose beside bridge)
2 pairs of alar cartilages (on both sides) (1 pair right under lateral & 1 pair on outer nostril/nose tip)
What are the nostrils?
The opening into nasal cavity
Describe nasal cavity shape
extends from nostrils to CHoanae
What is on the floor of the nasal cavity?
hard palate (1st) and soft palate (further back)
What bones (in order) make up the roof of the nasal cavity?
Nasal / Frontal/ Ethmoid / Sphenoid
Describe the nasal septum
Divides nasal cavity into left and right sides
formed by septal nasal cartilage
What are the 3 regions of the nasal cavity?
Nasal Vestibule (tip of nose)
Respiratory Region (largest/main)
Olfactory region (small/atop resp. region)
Describe the conchae and meatus structures, of the nasal cavity
COnchae = lateral walls on each side
Meatus = are the valleys within the conchae walls
Functions of COnchae and Meatus
COnchae = produce turbulence in the inhaled air
Meatus = drainage
Describe the functions of the 3 regions of the nasal cavity
Nasal Vestibule: lined by Vissabrae (skin & coarse hairs) that trap large particles
Respiratory Region: Passage for which air enters respiratory system (contains conchae/meatus)
Olfactory region: the receptors detects diff odors
What is the function of the Choanae/
"doorways" from nasal cavity to pharynx
Describe layout of tonsils
Pharyngeal tonsil (highest)
Lingual Tonsil (lowest)
What is the function of the tonsils in respiration?
trap germs and bacteria we breathe in
What is the major function of the Nasal Cavity?
warm, moisture/humidfy, and filter//cleanse air entering the body before it reaches lungs
Hair and mucus lining the nasal cavity trap dust/mold/pollen/other before they can enter body
What is the function of the nose?
Entrance for air
hair cleans the air of foreign particles