Respiratory System

Alveoli are made of simple squamous epithelium

http://science.nhmccd.edu/biol/respiratory/alveoli

with alveoli and respiratory bronchiole

http://cellbio.utmb.edu/microanatomy/

Alveoli

The alveoli are connected by interaveolar septum.

http://www.cedarville.edu/academics/sciencemath/

Alveoli

Individual alveolus surrounded by simple squamous epithelium

http://www.muhlenberg.edu/depts/biology/

Showing the passage of air into the alveolus

http://www3.umdnj.edu/histsweb/lab10/lab10lung.html

Alveolus with alveolar type II cell (type II pneumocyte) that secretes surfactant and capillaries that form the blood-air barrier.

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

Showing the passage of air into the alveolus

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

showing the movement of air into the alveolus. The alveoli are supported by reticular fibers.

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

Alveoli with Terminal Bronchiole

Longitudinal Section

http://cellbio.utmb.edu/microanatomy/respiratory/lung.htm

Alveoli with Terminal Bronchiole

Longitudinal Section

http://w3.ouhsc.edu/histology/Text%20Sections/Respiratory.html

cross section

http://w3.ouhsc.edu/histology/Text%20Sections/Respiratory.html

cross section

http://www.siumed.edu/~dking2/crr/CR009b.htm

Terminal Bronchiole

Cross-section with pseudostratified epithelium surrounded by hyaline cartilage, smooth muscle and adventita

This is not a respiratory surface.

http://w3.ouhsc.edu/histology/Text%20Sections/Respiratory.html

Pseudostratified epithelium surrounded by smooth muscle and adventita

This is not a respiratory surface.

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

The lamina propria contains lymphatic tissue. The tracheal cartilage forms the cartilage rings

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

Trachea

Trachea with pseudostratified epithelium that contains goblet cells that secrete mucous

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

Trachea

Trachea mucosa, submucosa, cartilage, and adventita

http://w3.ouhsc.edu/histology/Text%20Sections/Respiratory.html

Trachea lined with ciliated pseudostratified epithelium

http://www.siumed.edu/~dking2/intro/CR006c.htm

http://www.deltagen.com/target/histologyatlas/

Cross-section. The trachea maintains its rigid structure because of the tracheal cartilage rings.

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

With Bowman’s gland (ducts of the olfactory glands) and goblet cells for secreting mucous. The sustentacular (supportive cells) are located more superficially in the epithelium than the olfactory cells.

Nasal Cavity and Olfactory epithelium

http://www.lab.anhb.uwa.edu.au/mb140/CorePages/

Larynx

TF=true  vocal folds; SG= subglottis space; FF= false vocal folds; & V=ventricle of Morgani

http://www.allergies-ent.com/Advanced_larynx.htm

http://w3.ouhsc.edu/histology/Text%20Sections/Cartilage.html

http://w3.ouhsc.edu/histology/Text%20Sections/Cartilage.html

Pseudostratified epithelium and lamina propria with underlying layer of elastic cartilage