Question

Describe the 2 events that occur during the process of Epithelial lining of the gut between weeks 8-10

a) Formation of villi and intestinal glands
b) Fusion of the dorsal and ventral pancreatic buds
c) Closure of the neural tube and formation of the notochord
d) Differentiation of the three germ layers

Answer 1

During weeks 8-10, the process of epithelial lining of the gut involves the formation of villi and intestinal glands. Gastrulation leads to the formation of three germ layers, with the endoderm eventually forming the wall of the digestive tract.

Step-by-step explanation:

Gastrulation is the process during which the two-layered embryonic disc develops a third cell layer, called the mesoderm, and a primitive gut. This process occurs during the second week after fertilization and leads to the formation of three germ layers: endoderm, mesoderm, and ectoderm. The endoderm eventually forms the wall of the digestive tract.

The development of the germ layers is a crucial step in organogenesis, where these layers differentiate into different tissue types, organs, and organ systems. In the case of the gut, the formation of villi and intestinal glands is one of the events that occur between weeks 8-10. These structures play important roles in the absorption and digestion of nutrients.