If a person is transfused with a wrong or a different blood group than his own, he dies, but how is that a baby with a different blood group survives inside a mother's body.
2007-02-27 15:15:15 · 6 answers · asked by vaidehi 2 in Science & Mathematics ➔ Biology
When someone gets a transfusion of blood their red blood cells and those red blood cells in the transfusion mix together. The immune system of the person then recognizes what type of blood the new stuff is and if it's the wrong kind it can tell because of the markers in the blood and the new blood is attacked.
When a woman is pregnant, the baby can have a different blood type because their blood doesn't mix. The mother and the baby have separate systems when it comes to their blood, it's only the important "stuff" in the blood of the mother that gets transfered to the fetus.
Because the blood of the baby and the mother don't mix, the mother's immune system doesn't attack the blood of the baby.
2007-02-27 15:32:29 · answer #1 · answered by magica 2 · 1⤊ 0⤋
Baby's blood and mother's blood don't mix. Placental barrier prevents passage of blood cells that have antigens from entering in fetal circulation. But liquid portion of mothers blood with its anitbodies of specific types (IgG) can pass. This actually helps the baby to get immunity after birth but flip side of the coin is if baby is Rh+ ve and mother is Rh-ve and also possesses anti Rh antibodies ,these can pass through the placenta and cause a disease called erythroblastosis fetalis which can kill the baby.
2007-03-06 06:48:48 · answer #2 · answered by chiman 3 · 0⤊ 0⤋
There is no interchange of blood between baby and mother. Nutrients pass through the placenta to the baby, but blood does not pass directly.
There is a small risk during the actual childbirth, when baby's blood could get into the mother's bloodstream through tears in the vagina and elsewhere, but if doctor's are prepared for it the risk is practically zero.
2007-02-27 23:27:52 · answer #3 · answered by sspade30 5 · 1⤊ 0⤋
Placenta. Filter between the mothers blood and the babies.
2007-02-27 23:27:05 · answer #4 · answered by Anonymous · 1⤊ 0⤋
no exchange of blood between baby and mother. the placental barrier inhibit such type of blood exchange. only nutritional exchange takes place.
2007-03-04 01:46:11 · answer #5 · answered by dinesh320 2 · 0⤊ 0⤋
Agian.....
that's how our Lord God Almighty made it.
Just the perfect way so that niether one is affected.
2007-03-06 17:50:54 · answer #6 · answered by Layla 2 · 0⤊ 0⤋