Pneumocyte

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Two types of pneumocytes (also named pneumonocyte) contribute to the maintenance of the alveoli of the lungs: Type I pneumocytes and Type II pneumocytes. These cells function to aid in gas exchange, secretion of pulmonary surfactant, and self-regeneration

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Histology at KUMC resp-resp17
BU Histology Learning System: 13905loa
Electron micrograph at luc.edu

Anatomy: Lower RT respiratory system (TA A06.3–5, TH H3.05.02, GA 11.1084)

TB tree

Trachea	Tracheal rings Annular ligaments of trachea Carina

Bronchus	main bronchus right left lobar/secondary bronchi eparterial bronchus segmental/tertiary bronchi

Lungs

General	Left lung/Right lung Base/Apex Root/Hilum Superior lobe Lingula of left lung/Middle lobe of right lung Inferior lobe borders: Anterior border Cardiac notch Posterior border Inferior border surfaces: Costal surface Mediastinal surface Cardiac impression Diaphragmatic surface fissures: Oblique fissure Horizontal fissure

BP segment	Bronchiole: Conducting zone (Terminal bronchiole) Respiratory zone (Respiratory bronchiole Alveolar duct Alveolus Blood-air barrier)

Cells	Pneumocyte (Type I pneumocyte Type II pneumocyte) Clara cell Goblet cell

M: RES

anat (n, x, l, c)/phys/devp

noco (c, p)/cong/tumr, sysi/epon, injr

proc, drug (R1/2/3/5/6/7)

Human cell types / list derived primarily from endoderm

Foregut

Respiratory

Pneumocyte (Type I pneumocyte, Type II pneumocyte) · Clara cell · Goblet cell

Digestive

Stomach	enteroendocrine: G cell · D cell · ECL cell exocrine: Gastric chief cell · Parietal cell Foveolar cell

Intestine	enteroendocrine: K cell · S cell · D cell · I cell Goblet cell · Paneth cell Enterocyte (Microfold cell)

Liver	Hepatocyte · Hepatic stellate cell · (Kupffer cell from mesoderm)

Gallbladder	Cholecystocyte

Exocrine pancreas	Centroacinar cell · Pancreatic stellate cell

Endocrine

endocrine pancreas (alpha cell, beta cell, delta cell, F cell(PP cell), epsilon cell)

Pharyngeal pouch

Endocrine	thyroid (Follicular cell) · parathyroid (Parathyroid chief cell, Oxyphil cell)

Hindgut/cloaca

Urogenital	Urothelial cells

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Pneumocyte

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