Question

Placenta is formed by the interdigitation
between-
(A) Amnion and chorionic villi
(B) Allantois and chorionic villi
(C) Chorionic villi and uterine
tissue
(D) Chorionic villi and foetal
tissue​

Answer 1

Hi mate

The placenta is a temporary organ that connects the developing fetus via the umbilical cord to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy. Placentas are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development.

chorioallantoic placenta that forms from the chorion and allantois. In humans, the placenta averages 22 cm (9 inch) in length.

C is the correct option ☑️

Answer 2

Option (C) Chorionic villi and uterine

tissue