Respiratory system part 1 Flashcards
Functions of respiratory system
- Regulation of Blood pH
- Voice production
- Olfaction
- Innate immunity
Alters blood pH by changing blood CO2 levels
Regulation of blood pH
Air past the vocal cords makes sound and speech
Voice production
Sensation of smell
Olfaction
Protects against some microorganisms, by preventing it from entering our body by removing them from respiratory surfaces
Innate immunity
Divisions of respiratory system
- Upper respiratory tract
- Lower respiratory tract
Organs belonging to upper respiratory tract
Nose
Pharynx (throat)
Larynx
Organs belonging to lower respiratory tract
Trachea
Bronchi
Lungs
Consist of external nose and nasal cavity
Nose
visible structure (compose of hyaline cartilage)
External nose
is consist of bone and cartilage covered by connective tissue and skin
Bridge of external nose
or nostrils, external opening of the nose
Nares
or funnels, opening into the pharynx
Choanae
prominent body ridges, present on each side of the nasal cavity
Conchae
are air filled spaces within bone
Paranasal sinuses
Paranasal sinuses includes
- Maxillary
- frontal
- Ethmoidal
- Sphenoidal
inflammation of the mucous membrane of a sinus, once inflamed they produce excess mucous.
Sinusitis
carry tears from the eyes (also open into the nasal cavity)
Nasolacrimal ducts
dislodge foreign substance from the nasal cavity
- During this reflex, the uvula and soft palate are depressed
Sneeze reflex
stimulated by exposure to bright light such as the sun
- also sometimes called ACHOO
Photic sneeze reflex
ACHOO
autosomal dominant compulsive helio-ophthalmic outbursts
Throat, is a common passageway for both respiratory and digestive tract
Pharynx
Three regions of Pharynx
- Nasopharynx
- Oropharynx
- Laryngopharynx
superior part of the pharynx, posterior to choanae, superior to the soft palate
Nasopharynx
little grape, posterior extension of the soft palate.
Uvula
extends from uvula to the epiglottis, thus food and air passes through the oropharynx
Oropharynx
passes posterior to the larynx and extends from the tip of the epiglottis to the esophagus
Laryngopharynx
commonly called the voice box, located in the anterior throat and extends from the base of the tongue to the trachea
Larynx
Three functions of Larynx
- Maintains an open airway
- Protects the airway during swallowing
- Produces voice
Shield shape or Adam’s apple
Thyroid cartilage
ring shape
Cricoid cartilage
The 3 pairs of cartilage
- Cuneiform cartilage (wedge shape)
- Corniculate cartilage (horn shape)
- Arytenoid cartilage (ladle shape)
2 sets of vocal ligaments
- Vestibular folds
- Vocal folds
false vocal cords, superior
Vestibular folds
true vocal cords (inferior)
Vocal folds
are the primary source of voice production.
Vocal folds
inflammation of the mucous epithelium of the vocal folds (thus inhibits voice production)
Laryngitis
windpipe, Allows air to flow into the lungs
Trachea
What tissue makes up the trachea
Connective tissue
Reinforces trachea
16 to 20 “C-shaped” rings of hyaline cartilage
at the posterior of the C-shape rings, consist of
- Elastic, ligamentous membrane
- and bundles of smooth muscle
what type of membrane lines the trachea?
- Mucous membrane
The membrane of trachea is consists of
Pseudostratified columnar epithelium
The membrane of trachea is consists of
Cilia and goblet cells
The trachea divides into left and right main bronchi or primary bronchi
Bronchi
more horizontal than right because it is displaced by the heart
Left main bronchus
principal organs of respiration, cone shape, base resting in diaphragm
Lungs
lobes of right lung
- Superior lobe
- Middle lobe
- Inferior lobe
Lobes in the left lung
- Superior lobe
- Inferior Lobe
Each lobe is divided into
bronchopulmonary segments
consist of the main bronchi and many branches
Tracheobronchial tree
Each main bronchus is divided into
Lobar bronchi (secondary bronchi)
Lobar bronchi in turn is divided into
Segmental bronchi (Tertiary bronchi)
also subdivide numerous times to give rise to Terminal bronchioles
Bronchioles
Terminal bronchiles is divided into
Respiratory bronchioles
Each respiratory bronchioles is subdivided to form
Alveolar ducts
hollow sacs, are small air filled chambers where the air and the blood come into close contact with each other
Alveoli
is where gas exchange between the air and blood takes place
Respiratory membrane
Respiratory membrane is consist of what layers
2 layers of simple squamous, including secreted fluid called alveolar fluid
Layers of respiratory membrane
- Thin layer of alveolar fluid
- Alveolar epithelium
- Basement membrane
- Thin interstitial space
- Basement membrane of capillary endothelium
- Capillary endothelium
Specialized secretory cells within the walls of the alveoli secrete a chemical
Surfactant
What does surfactant do?
Reduces the tendency of alveoli to recoil