Lesson 3 Flashcards
The nurse is temporarily the consciousness of the unconscious, the love of life of the suicidal, the leg of the amputee, the eyes of the newly blind, a means of locomotion for the newborn, knowledge and confidence for the young mother, a voice for those too weak to speak, and so on
Virginia Henderson, RN
It is an intricate arrangement of spaces and passageways that conduct the air into the lungs
Respiratory System
The respiratory system is divided into 2 sections:
Upper Respiratory Tract
Lower Respiratory Tract
Upper Respiratory Tract:
Nostril
Nasal Cavities
Pharynx
Epiglottis
Larynx
Lower Respiratory Tract:
Trachea
Bronchia
Bronchioles
Lungs
What are the Phases of Respiration?
Pulmonary Ventilation
External Exchange of Gases
Internal Exchange of Gases
The exchange of air between the atmosphere and the air sacs (alveoli) of the lungs
Pulmonary Ventilation
This is normally accomplished by inhalation and exhalation of breathing
Pulmonary Ventilation
Occurs in the lungs when oxygen (O2) diffuses from the alveoli into the blood and carbon dioxide (CO2) diffuses out of the blood to be eliminated
External Exchange of Gases
Occurs in the tissues as O2 diffuses from the blood to the cells, CO2 passes from the cells into the blood
Internal Exchange of Gases
External portion produces from the face and supported by the nasal bones and cartilage
Nose ( External and Internal portions )
The external openings of the nasal cavity
Nostril or Nares
Internal Portion
Nasal Cavity
Each Nasal Cavity is divided into 3 passageways by the projection of the turbinates:
Turbinate Bones
Mucus
Paranasal Sinuses
It is also called conchae “ shell-like appearance”
Turbinate Bones
What are the three parts of turbinate Bones?
Inferior Turbinate
Middle turbinate
Superior turbinate
Secreted continuously by goblet cells, covers the surface of the nasal mucosa and is moved back to the nasopharynx by the action of the cilia (fine hairs)
Mucus
Are four pairs of bony cavities that are lined with nasal mucosa and ciliated pseudo stratified columnar epithelium
Paranasal Sinuses
Serve as a resonating chamber in speech (phonation)
Paranasal Sinuses
Sinuses are named by their location:
Frontal
Ethmoidal
Sphenoidal
Maxillary
is a funnel shaped tube that connects the nasal and oral cavities to the larynx
Pharynx
It is a common opening between the digestive and respiratory system
Pharynx
3 regions of the pharynx:
Nasopharynx
Oropharynx
Laryngopharynx
Located posterior to the nose and above the soft palate
Nasopharynx
Houses the faucial or palatine, tonsils
Oropharynx
Extends the hyoid bone to the cricoids cartilage
Laryngopharynx
Function:
Passageway for the respiratory and digestive tracts
Pharynx
Are found in the pharynx
Tonsils
3 types of tonsils
Pharyngeal tonsil or adenoid
Palatine tonsils
Lingual tonsils
Located high in the nasopharynx
Pharyngeal tonsil or adenoid
Located in the oropharynx at the end of the soft palate
Palatine tonsils
Located at the base of the tongue
Lingual tonsils
Function:
act as part of the immune system to help protect against infection
Tonsils
Is a cartilaginous epithelium- line structures that connects the pharynx and the trachea
Larynx
Structures of the larynx :
Epiglottis
Glottis
Thyroid cartilage
A valve flap of cartilage that covers the opening of the larynx during swallowing
Epiglottis
It is also referred to as “ guardian of the airways”
Epiglottis
A slitlike passageway or opening between the vocal cords in the larynx
Glottis
A largest of the cartilage structure; part of it forms the “ adams apple”
Thyroid cartilage
3 parts of thyroid cartilage:
Cricoid cartilage
Arytenoid cartilage
Vocal cords
The only complete cartilaginous ring in the larynx (located below the thyroid cartilage)
Cricoid cartilage
Used in vocal cord movement with the thyroid cartilage
Arytenoid cartilage
Ligaments controlled by muscular movements that produce sounds; located in the lumen of the larynx
Vocal cords