Question

The concentration of which of the following substances will decrease in the maternal blood as it flows from embryo to placenta through the umbilical cord?

The human foetus within the uterus

1. Oxygen
2. Amino Acids
3. Carbon dioxide
4. Urea

विकल्प

• i and ii

• ii and iv

• iii and iv

• i and iv

Answer 1

i and ii