Table of Contents
Triploblasty
Endoderm – Definition: It is a condition of the body in which it is divided into three layers of tissue. The three layers are the ectoderm, the mesoderm, and the endoderm. These three layers give rise to all of the body’s tissues and organs.
Endoderm Definition
The endoderm is the innermost of the three germ layers in a developing embryo. It gives rise to the lining of the digestive tract and the respiratory system. The endodermal cells are the outermost of the three primary germ cell layers, the innermost being the ectoderm and the middle the mesoderm.The endoderm is the innermost of the three primary germ cell layers in the very early embryo.
Formation of Endoderm Layer
The ectoderm and the endoderm are the two primary germ layers that form in the embryo. The ectoderm becomes the skin, hair, nails, and nervous system, while the endoderm becomes the digestive system and the lungs.
The process of forming the endoderm layer begins on day 18 of embryonic development, when a small group of cells in the ectoderm called the primitive streak begins to divide. These cells become specialized and form two layers: the ectoderm and the endoderm.
The endoderm then becomes further specialized and forms the lining of the gastrointestinal tract and the respiratory system.
Functions of Endoderm
The endoderm is one of the three primary germ layers in the embryo. The endoderm forms the lining of the digestive system and the respiratory system. It also forms the lining of the urinary and reproductive systems.
List of Organs Formed by Endoderm and Its Functions
There are a number of organs that are formed by the endoderm and they have various functions. Some of these organs include the lungs, liver, and pancreas.
The lungs are responsible for exchanging carbon dioxide and oxygen in the blood. Therefore liver is responsible for filtering toxins from the blood and producing bile. The pancreas is responsible for secreting digestive enzymes and insulin.
