C-87 Nasal epithelium Respiratory segment –Pseudostratified epithelium (Respiratory epithelium) Ciliated cell, goblet cell, brush cell, small granule cell, basal cell –Lamina propia A complex set of capillary loops, mucous gland with serous demilune –Periosteum of the adjacent bone Olfactory segment

–Pseudostratified epilthelium (olfactory epithelium) Olfactory cell (bipolar neuron), supporting cell, brush cell, basal cell, much thicker than respiratory epithelium –Lamina propia Olfactory gland (bowman’s gland), myelinated nerve, unmyelianted nerve –Periosteum of the adjacent bone Compare : Olfactory epithelium Respiratory epithelium

Goblet cell Nerve Thicker or thiner ( epithelium ) …… Compare : Olfactory epithelium Respiratory epithelium

Olfactory epithelium Respiratory epithelium

Olfactory mucosa

A60 Nose, upper lip Vibrissae( hair follicles) Sebaceous glands Smooth muscle Mucous glands, serous glands Lots of blood vessels

A-100 Vocal cord Vocal fold, vocalis muscle, ventricle, ventricular fold (false vocal fold), Stratified squamous epithelium, stratified columnar epithelium, pseudostratified epithelium Mixed glands Hyaliane cartilage Vacalis muslce: skeletal muscle

vocalis muscle vocal fold ventricle ventricular fold

B-24 Mammal trachea, cs Mucosa –Respiratory epithelium (ciliated cell, goblet cell, etc), thick basement membrane –loose connective tissue Submucosa –Loose connective tissue, submucosal glands Cartilaginous layer, or muscular layer Adventitia

Trachea

B-25, 26, A-49 Lung Bronchi Mucosa –Respiratory epithelium –Lamina propia Muscularis: SmM Submucosa: glands Cartilage layer: hyaline Adventitia Bronchioles Epithelium pseudostratified epi., simple columnar epi., simple cuboidal epi. Layer of smooth muscle Lack of gland and cartilage plate

Pulmonary acini –Terminal bronchiole: without goblet cell simple cuboidal epi, ciliated cell, clara cell –Respiratory bronchiole: ciliated cell, clara cell, smooth muscle layer alveoli : gas exchange –Alveoli Alveolar duct Alveolar sac Alveoli –Type I : thin squamous cells, 95% alveolar surface –Type II : cuboidal cells, 5% –alveolar cell, capillary

Bronchioles Alveolar ducts & alvelar sacs

Bronchiole & respiratory bronchioles

Terminal brochioles Clara cells Respiratory bronchiole

Septal cell Type II Alvelus