Related Experiment Video
Updated: Aug 18, 2026

Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds
Published on: February 11, 2021
[An electron microscopic observation on laryngeal epithelium in human fetus and adults]
1Second Hospital, Ninpe.
Insights
The laryngeal mucous membrane
Area of Science:
- Developmental Biology
- Histology
Context:
- Study of human laryngeal development
- Utilizes electron microscopy techniques
Purpose:
- To investigate the maturation of laryngeal mucous membrane structures
- To characterize the development of ciliated and squamous epithelia in the larynx
Summary:
- Ciliated epithelium development begins at 9 weeks and matures by 17 weeks.
- Vocal cord epithelium matures by 9 weeks, becoming squamous by 14 weeks.
- A transitional zone shows gradual ciliated to squamous epithelium transformation.
Impact:
- Provides detailed insights into human laryngeal morphogenesis.
- Establishes developmental timelines for laryngeal epithelial tissues.
- Contributes to understanding normal laryngeal structure and potential developmental abnormalities.
Abstract:
Seventeen specimens of laryngeal mucous membrane taken from 14 fetus (9-38 week), 1 newborn and 2 adults were studied with scanning and transmission electron microscopes. The results showed that the cilia of ciliated epithelium began to develop in the 9th week embryo and matured at the 17th week; the epithelium of vocal cord matured during the 9th week and showed squamous epithelium during the 14th week. In the transitional area the ciliated epithelium gradually transformed into squamous epithelium.
Related Concept Videos
Classification of Epithelial Tissues: Simple Epithelium
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...
Larynx
Anatomy of the Larynx
The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids, corniculates, and...

