Changes

{{no pics}}

{{no pics}}

==Introduction==

==Introduction==

The endoderm will form the lining of the gut and the organs that develop from it. Splanchnic mesoderm surrounds the endoderm and orginates from the lateral plate mesoderm. It will form the smooth [[Muscles - Anatomy & Physiology|muscle]] of the gut that are used for peristalsis.

The endoderm will form the lining of the gut and the organs that develop from it. Splanchnic mesoderm surrounds the endoderm and orginates from the lateral plate mesoderm. It will form the smooth [[Muscles - Anatomy & Physiology|muscle]] of the gut that are used in peristalsis.

<br />

<br />

<br />

<br />

==Endoderm Development==

==Endoderm Development==

During endodermal development, the anterior end of the embryo invaginates. This invagination is called the '''anterior intestinal portal''' or '''(AIP)'''. The opposing anterior ends of the endoderm are brought together by this invagination, allowing both ends to fuse together to close the endoderm. A similar process occurs at the posterior of the embryo where an invagination occurs called the '''caudal intestinal portal''' or '''(CIP)'''. This invagination closes the posterior of the endoderm. The invagination and closure spread to the middle of the anterior - posterior axis where they meet at the yolk stalk. After the yolk has been metabolised, the yolk stalk can be closed.

During endodermal development, the anterior end of the embryo invaginates. This invagination is called the '''anterior intestinal portal''' or '''(AIP)'''. The opposing anterior ends of the endoderm are brought together by this invagination, allowing both ends to fuse together to close the endoderm. A similar process occurs at the posterior of the embryo where an invagination occurs called the '''caudal intestinal portal''' or '''(CIP)'''. This invagination closes the posterior of the endoderm. The invagination and closure spread to the middle of the anterior - posterior axis where they meet at the yolk stalk. After the yolk has been metabolised, the yolk stalk can be closed.