Respiratory Models & Histology
Lab Book Page 339
Fig. not in
your lab
book
The Upper Respiratory Structures
• Nasal Cavity
– Contains the superior, middle and inferior
nasal conchae
• Pharynx
– Divided into three sections the nasopharynx,
oropharynx and laryngopharynx
Lab Book page 340
Sagittal Head
Superior Nasal
Conchae
Middle Nasal Conchae
Inferior Nasal Conchae
External nares
Sagittal Head
Frontal Sinus
Sphenoid (Sphenoidal)
Sinus
Nasopharynx
Oropharynx
Laryngopharynx
Sagittal Head
Larynx – Epiglottis
Larynx – Thyroid
Cartilage
Esophagus
The Lower Respiratory Structures
• Larynx
– Made of cartilage and ligaments
– 3 Major cartilages of the larynx:
• Thyroid cartilage
• Cricoid cartilage
• Epiglottis
– Contains vocal cords, which surround an
opening called the glottis
Lab Book page 342
Larynx Anterior View
Hyoid Bone
Epiglottis
Thyroid Cartilage
Laryngeal Prominence
Cricoid Cartilage
Tracheal Cartilage
Larynx Superior View
Epiglottis
Glottis
(hole)
Vocal Cords
Arytenoid Cartilage
Trachea
• Windpipe – brings
air to/from lungs
• Contains tracheal
cartilages which
protect the airway
and prevent
collapse
Fig. not
in you
lab book
Bronchial Tree
Fig. not
in you
lab book
Thoracic Model – Internal View
Right
Brachiocephalic
vein
Left
Brachiocephalic
vein
Superior Vena
Cava
Esophagus
Aortic Arch
Pulmonary Arteri
Pulmonary Veins
Thoracic Model – Internal View
Trachea
Primary
bronchus
Secondary
bronchus
Tertiary
Bronchus
Thoracic Model – External View
Right Lung
Superior Lobe
Right Lung
Middle Lobe
Right Lung
Inferior Lobe
Diaphragm
Left Lung
Superior Lobe
Cardiac notch
of left lung
Left Lung
Inferior Lobe
2 Respiratory Slides
• 1. Slide of the TRACHEA
• 2. Slide of a BRONCHIOLE
SLIDE OF
TRACHEA – lab
book pg. 345 Fig. 6
LUMEN of Trachea
Goblet Cells
Pseudostratified Ciliated Columnar Epithelium
Hyaline Cartilage
Close-up of Trachea showing a Goblet Cell
Goblet
Cell
Bronchiole & Alveoli
Fig. not
in you
lab book
Lab Book page 346
Fig. 7 (b)
Bronchiole
(notice it is filled
with air so it is
empty inside)
Alveoli or
Alveolar Sacs
Simple
Squamous
Epithelia
Blood Vessel
(notice it is filled
with RBC’s)
Slide of a Bronchiole
Alveoli or
Alveolar Sacs
Fig. not
in you
lab book
Also known as a septal cell: produces SURFACTANT which reduces the
surface tension in the alveoli
Practice Slides!!!
Slide of a Bronchiole
Thoracic Model – External View
Thoracic Model – Internal View
Thoracic Model – Internal View
Larynx Anterior View
Larynx Superior View
Sagittal Head
Sagittal Head
Sagittal Head
5 basic functions of the respiratory system:
1. Provide an extensive area for gas exchange
between air and blood
2. Move air to and from the exchange surfaces of
the lungs
3. Protect respiratory surfaces from dehydration
or other environmental variations to prevent
invasion of pathogens
4. Produce sounds
5. Provide olfactory sensations to the CNS