Question

Поможіть.Установіть послідовність процесів розвитку зародка. A) Утворення пуповини; Б) утворення оболонок плоду; B) утворення зародкових листків; Г) імплантація; Д) утворення органів і систем.

Answer 1

Г)iмплантацiя
В)утворення зародкових листкiв
Д)утворення органiв та систем
А)утворення пуповини
Б)утворення оболонок плоду

Answer 2

Development of the Embryo

The sequence of processes in the development of the embryo is as follows:

A) Implantation - Implantation is the process by which the fertilized egg attaches itself to the uterine wall. This is a crucial step in the development of the embryo. - "Implantation is the process by which the developing embryo, or blastocyst, attaches to the lining of the uterus to begin the growth process" .

B) Formation of Embryonic Membranes - After implantation, the formation of embryonic membranes occurs. These membranes play important roles in the development and protection of the embryo. - "The embryonic membranes are the amnion, chorion, yolk sac, and allantois. They develop from the inner cell mass and trophoblast of the blastocyst" .

C) Formation of Embryonic Germ Layers - Following the formation of embryonic membranes, the process of forming the embryonic germ layers takes place. These layers give rise to different tissues and organs in the developing embryo. - "The three primary germ layers are the ectoderm, mesoderm, and endoderm. They form during the process of gastrulation, which is the transformation of the blastula into the gastrula" .

D) Formation of Organs and Systems - Subsequently, the formation of organs and systems occurs as the embryonic germ layers differentiate and develop into specific structures. - "During the organogenesis stage, the cells continue to differentiate and form the various organs and systems of the body, such as the heart, brain, lungs, and digestive system" .

E) Formation of Umbilical Cord - Finally, the formation of the umbilical cord takes place, connecting the embryo to the placenta and providing essential nutrients and oxygen to the developing fetus. - "The umbilical cord forms from the connecting stalk and contains blood vessels that transport nutrients and oxygen to the developing fetus and remove waste products" .

This sequence of processes illustrates the remarkable journey of development from the initial implantation to the formation of vital structures in the developing embryo.