Question

The umbilical cord is a structure that

• A. forms the connection between foetus and placenta
• B. serves to connect the placenta to the endometrium
• C. is solely responsible for the formation of placenta
• D. forms the cavity of gastrula

Answer 1

The correct option is A forms the connection between foetus and placenta

The umbilical cord is a structure that connects the developing foetus to the placenta.
The placenta is a temporary structure that helps in the exchange of nutrients, respiratory gases, and metabolic waste products between the mother and the developing foetus. It is formed during pregnancy.
It is formed by a combination of maternal tissues (endometrium) and foetal tissues (trophoblast of the blastocyst). So, it can be said that the placenta consists of endometrial components.
Gastrula is the structure formed after the blastocyst undergoes a process called gastrulation. It has three germ layers. Archenteron forms the cavity of gastrula.