Some babies are born with an opening between the right atrium and the left atrium. In these babies, a larger number of red blood cells is found. What is the cause of this rise in red blood cells in these babies?
- ABlood is pumped faster, which causes more blood to circulate in the heart.
- BMore blood is needed in the heart because the pressure is lower.
- CTheir haemoglobin has a higher affinity for oxygen.
- DThere is a lower oxygen concentration in the body of the newborn baby.