???? ??? ???? 48/21/2023 The embryo is surrounded by fluid inside the amniotic sac. In these early weeks of pregnancy, the embryo is attached to a tiny yolk sac that provides nourishment.Ī few weeks later, the placenta will be fully formed and take over the transfer of nutrients to the embryo. the outer layer becomes the brain and nervous system, the eye lenses, tooth enamel, skin and nails.the middle layer becomes the heart, blood vessels, muscles and bones.the inner layer becomes the breathing and digestive systems, including the lungs, stomach, gut and bladder.The outer cells reach out to form links with your blood supply. The inner cells form into 2, and then later into 3 layers.Įach of these layers will grow to be different parts of your baby's body: In weeks 4 to 5 of early pregnancy, the embryo grows and develops within the lining of your womb.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |