PHYSIOLOGY
REPRODUCTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
large diffusion distance
|
|
|
small diffusion distance
|
|
|
high concentration gradient due to good blood supply
|
|
|
low concentration gradient due to good blood supply
|
|
|
large surface area
|
Detailed explanation-1: -The fetal surface of the placenta should be shiny, gray and translucent enough that the color of the underlying maroon villous tissue may be seen. At term, the typical umbilical cord is 55 to 60 cm in length, 3 with a diameter of 2.0 to 2.5 cm.
Detailed explanation-2: -The placenta is an organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to a growing baby. It also removes waste products from the baby’s blood. The placenta attaches to the wall of the uterus, and the baby’s umbilical cord arises from it.
Detailed explanation-3: -The placenta allows substances to diffuse from the mother’s blood to the foetus (e.g. oxygen and glucose). Substances can also diffuse from the foetus to the mother’s blood (e.g. carbon dioxide and urea ). The placenta is adapted for diffusion by having: A large surface area between it and the uterus wall.