Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2003;62(3):285-7.

Anal canal development in the embryonic and early foetal period

Piotr Kromer  1 , Ewa Korzeniowska-Kromer
Affiliations
  • PMID: 14507068

Anal canal development in the embryonic and early foetal period

Piotr Kromer et al. Folia Morphol (Warsz). 2003.

Abstract

The aim of study is to investigate the development of the anal canal in human embryos and foetuses. In embryos at stage 19 the boundary between the ectodermal and endodermal linings of the anal canal is located just below the level of the internal anal sphincter muscle. Histological sections showed that the first signs of anal columns are observed in embryos at stage 21 (51 days).

PubMed Disclaimer

MeSH terms