Question

What connects the Embryo to the Placenta?

Answer 1

We all know that Placenta is a temporary organ that is formed in the eutherian mammals only which is formed if the tissues derived from the two different individuals, which is the foetus and the mother. There is a long chord-like structure that connects the Embryo with the Placenta. It serves the purpose of exchange of nutrition and excretory wastes between mother and the child.

Complete answer:
An aquatic embryo is surrounded by water, which protects the Embryo, keeps it moist, removes the wastes and permits gas exchange. In land vertebrates, these functions are taken over by the extraembryonic membranes, some of which take part in the formation of placenta in mammals. The placenta develops heavily on the mother’s body for its vital requirements.

Placenta is a temporary organ formed in the eutherian mammals only, and it is the only organ in animals formed of the tissues derived from two different individuals, the foetus and the mother. It serves to bring the foetus and maternal blood close enough to permit exchange of materials between the two.

The foetus is connected to the placenta by means of Umbilical cord which is attached near the centre. It provides the foetus with the main blood vessels. Umbilical cord is a rope-like cord that contains 2 arteries and a vein and it helps in carrying oxygen and nutrition to the foetus and waste products towards and away from the foetus.

Hence the correct answer is “Umbilical cord”.

Note: Foetal circulation flow takes place from the foetal to the two umbilical arteries which carry oxygenated air which gets transferred to the chorionic arteries in the cotyledon. It takes place through the capillary beds to exchange gases with the maternal blood and then back into the foetus via a single umbilical vein. This vein carries oxygenated blood.