UNSW Embryology

Respiratory Development - Stage 22 (highpower)

© Dr Mark Hill (2008)

Acknowledgements

Introduction

A detailed section of images from the Stage 22 Embryo respiratory system from trachea to developing lungs and diaphragm.

Page Links: Introduction | Trachea | Lungs | Embryo Sections | Glossary

Clicking on the section numbers below will open the full image.

Selected Highpower

	Clicking on the section number will open the full image.   B7,C1: Laryngeal caecum. Arytenoid swellings. Thyroid cartilage. L,R laminae and superior processes. Hyoid cartilage with sternohyoid muscles.
	C2,C3: Tracheal epithelium. Note in C2, ventral tracheal cartilage. In C3 note rounded cells of hyaline tracheal cartilage, starting to push apart in central midline zone but compressed together at lateral margins. Thyroid gland.
	C4: Tracheal epithelium (vacuolated) and trachealis muscle. Note regional changes in cartilage as in C3 above. Oesophagus - epithelium (vacuolated), submucosa and muscularis externa with a few inner spiral and isolated, outer longitudinal muscle bundles.
	C5,C6: Developing thymus.
	Dl: Note bronchial epithelium (tall wedge-shaped cells) with subepithelial smooth muscle, surrounding loose connective tissue and visceral pleura.

UNSW Histology Slides

The following slides are from the UNSW, Department of Anatomy, Histology Slide Set 2003. Slides are numbered according to the Histology Set number. The tissues listed relate to this developing system. Note that most slides are from mature tissues (unless otherwise indicated, see also all slides).

Slide	Tissue	Animal	Stain
51 6 6A 79 79A 55 50 50a 6 78	Larynx (neonatal) Lung (reticular fibres) Lung (elastic fibres) Lung Lung Nasal cavity Palate (soft) Palate (soft) Lung (reticular fibres) Trachea	human cat guinea pig cat human monkey dog dog cat human	H & E, Alcian Blue Silver, Nuclear Fast Red,Tartrazine Aldehyde Pararosanilin Picro-Mallory H & E Alcian Blue, H & Van Gieson H & E PAS, Tartrazine, Iron H. Silver, Nuclear Fast Red,Tartrazine H & E

WWW Histology

Links to related WWW sites with Histological images for Respiratory system.
Note that all internet links change with time if link does not work use text shown to search WWW. (Also see All systems)

• Loyola University Medical Education Network (LUMEN- Histology)
  • Part 15: Respiratory Tract
• University of WA- Department of Anatomy and Human Biology (Histology Notes)
  • MB140 - Histology - Respiratory System
• University of Kansas Department of Anatomy and Cell Biology (JayDoc HistoWeb)
  • Respiratory System
• Harvard Medical School (MedWeb)
  • Resp_Labs_Normal
• The College of Medicine at the University of Florida (Histology Tutorial)
  • Laboratory 10: Respiratory System (Respiratory System Quiz)

Stage 22 Embryo (Human)
A1	A2	A3	A4	A5	A6	A7
B1	B2	B3	B4	B5	B6	B7
C1	C2	C3	C4	C5	C6	C7
D1	D2	D3	D4	D5	D6	D7
E1	E2	E3	E4	E5	E6	E7
F1	F2	F3	F4	F5	F6	F7
G1	G2	G3	G4	G5	G6	G7

Glossary

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Quick Links

Development Notes ----------------- Menstrual Cycle Week 1 Week 2 Week 3 Week 4 Placenta Serial Images Genes/DNA Molecular Dev Abnormal Dev Postnatal Dev Notes Index

System Notes ----------------- Heart/Cardiovascular Respiratory Coelomic cavity Gastrointestinal Tract Head and Neck Neural Neural Crest Eye Ear Nose Endocrine Urogenital Musculoskeletal Integumentary

Movies ----------------- Embryo Growth Ultrasound Week 1 Week 2 Week 3 Week 4 Stage 13/14 Stage 22 Neural Head and Neck Heart Vasculature Gastrointestinal Urogenital Other Embryos Larsen Internet

Other Embryos ----------------- Chicken Fly Frog Mouse Rabbit Rat Worm Zebrafish Guinea Pig

UNSW Embryology ISBN: 978 0 7334 2609 4

UNSW CRICOS Provider Code No. 00098G