A Foetus is formed by the growth and development of an embryo. A Foetus is an unborn baby in the uterus in the later stages of development (after 8 weeks till birth). A Foetus is also multicellular. The body features of developing baby can be identified.
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A fetus is the unborn baby.
Protection
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amniotic fluid. :)
The umbilical cord delivers oxygen and nutrients to the fetus and removes wastes.
It really has no function just as in any other fetus. Blood flow to the tissues there are at a normal rate just as to the feet and head. It isn't until the fetus is born that the lungs function as a gas exchange organ.
it is the interface between the fetus and the mother's blood supply it acts like a filter - supplying nutrients to the fetus and disposing of waste material from the fetus to the mother all of this without actually mixing the blood of the fetus and the mother
it permits the passage of nutrients and oxygen from the mother to the fetus.
It nourishes the fetal pig.