What is the function of the amniotic sac?

Answer 1

The amniotic sac contains amniotic fluid, which has a number of roles which are important in the development of the fetus.

# It acts as a thermal buffer and a shock absorber, and therefore protects the developing fetus. # The fetus drinks the amniotic fluid (this is called fetal respiration) and urinates into it. # It lubricates delivery of the fetus at term. # It is isotonic, so has the same water potential as the blood. # It is exchanged by the fetal skin up to 20 weeks of pregnancy. # It maintains a sterile environment for the fetus. # It aids development of the muscles and bones of the fetus. # Allows free movement of the fetus. # The amniotic sac acts as a hydrostatic wedge during the first stages of labour. Also, cells that are sloughed off from the fetus into the amniotic fluid can be cultured after an amniocentesis to look for genetic conditions such as Down's syndrome, however, this is not really a purpose of amniotic fluid.

Answer 2

After twelve days of pregnancy, the amniotic sac forms inside the uterus. It begins to fill with fluid shortly after conception. The function of the amniotic sac is to hold the baby and the amniotic fluid for the pregnancy.

Answer 3

Before the amniotic egg, vertebrates were only able to lay their eggs in water (think about frogs). The amniotic eggs allowed vertebrates to reproduce and lay eggs on dry land. Thus the animals are able to live and reproduce far away from large bodies of water.

When eggs are laid in the water the embryos are able to get oxygen and remove wastes by diffusion. The amniotic egg cannot do this so it has the allantois which provides oxygen and a reservoir for wastes. The thick shell surrounding the egg also prevents the egg from drying out. Both of these are important features for allowing animals to lay eggs on dry land!

Answer 4

basically the fluid sac acts like a cushion to protect the baby. if it bursts it will burst early on before the baby moves , to tell that it has burst you will feel a sudden clutching feeling.

Answer 5

In an amniote egg, the amniotic sac is the sac where the fetus develops. It holds the embryo and gives it protection.

Answer 6

to cushion the baby.