The digestive tube is formed from the yolk sac. The entoderm forms the epithelial lining, and … Digestive System DevelopmentRead more
Peritoneum and Peritoneal Cavity Development
Once the lateral mesoderm has split into somatic and splanchnic layers, a cavity is formed between … Peritoneum and Peritoneal Cavity DevelopmentRead more
Abdominal Wall Development
Following segmentation of the mesoderm, the lateral mesoderm splits into a somatic and a splanchnic layer … Abdominal Wall DevelopmentRead more
Testis Development
The male sex chromosome causes the genital ridge to secrete testosterone and induces the development of … Testis DevelopmentRead more
Inguinal Canal Development
A peritoneal diverticulum called the processus vaginalis forms before the descent of the testis and the … Inguinal Canal DevelopmentRead more
Heart Tube Development
Clusters of cells arise in the mesenchyme at the cephalic end of the embryonic disc, cephalic … Heart Tube DevelopmentRead more
Development of the Lungs and Pleura
longitudinal groove, the laryngotracheal groove, develops in the endodermal lining of the floor of the pharynx. … Development of the Lungs and PleuraRead more
Diaphragm Development
The diaphragm is formed from the following structures: (a) the septumtransversum, which forms the muscle and … Diaphragm DevelopmentRead more
Sternum Development
The adult sternum consists of three parts: manubrium, body, and xiphoid process (see Fig. 4.1). Prenatally, … Sternum DevelopmentRead more
Upper Limb Development
The limb buds appear during the 6th week of development as the result of a localized … Upper Limb DevelopmentRead more