During gestation, maternal blood flow to the placenta and uterus increases significantly to support the metabolic demands of the developing conceptus.
The table below shows the rate of blood flow per kilogram of uterine tissue for a pregnant ewe (sheep) and a non-pregnant ewe:
| Ewe status | Uterine blood flow rate per kg of tissue (cm3 min−1\text{cm}^3\text{ min}^{-1}cm3 min−1) |
|---|---|
| pregnant | 21.821.821.8 |
| non-pregnant | 2.32.32.3 |
Calculate the difference in the volume of blood flow per kg of uterus in an 18-hour period. Give your final answer in cm3\text{cm}^3cm3.
Explain two biological advantages to the fetus of this increased blood flow.
43 exam-style questions on Edexcel IGCSE Biology Reproduction. Each one has a worked solution and a mark scheme showing where the marks go.