Question

. During development in human a special tissue structure is developed between the uterus wall of mother and the developing foetus. What among the following is wrong statement about this structure ? *A] The structure is called as Placenta
B] It supplies nutrition from mother to the foetus
C] It supplies oxygen from mother to the foetus
D] It supplies excretory materials from mother to the foetus​

Answer 1

During development in human a special tissue structure is developed between the uterus wall of mother and the developing foetus. This structure is called as Placenta

ANSWER:

Option D is incorrect. It supplies excretory materials from mother to the foetus.

REASON:

Placenta supplies excretory materials from the foetus to mother.

EXPLANATION:

• During the period of gastrulation, the blastocyst gets embedded into the uterus of mother.

• The blastocyst becomes gastrula and undergo further cleavage and development.

• During the third month of gestation , the placenta is completely developed.

• Placenta is an undifferentiated tissue establishing the connection between the mother and the foetus.

• Placenta supplies nutrition and oxygen from mother to the foetus.

• Placenta also collects the excretory materials like carbon dioxide and nitrogenous waste from the foetus to mother.

• The placenta secretes an appreciable amount of progesterone which is responsible for maintenance of pregnancy.