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During Pregnancy

During Pregnancy. describe the role of the placenta in the nutrition of the developing embryo understand how the developing embryo is protected by amniotic fluid. Zygote to Embryo. The zygote formed will begin to develop into an embryo which will implant in the lining of the uterus.

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During Pregnancy

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Presentation Transcript

  1. During Pregnancy • describe the role of the placenta in the nutrition of the developing embryo • understand how the developing embryo is protected by amniotic fluid

  2. Zygote to Embryo • The zygote formed will begin to develop into an embryo which will implant in the lining of the uterus. • This is where the embryo will develop a placenta.

  3. The placenta • The placenta, allows the embryo to obtain materials such as oxygen and nutrients from the mother’s blood. • It also allows the embryo to get rid of waste products such as urea and carbon dioxide. • It also anchors the embryo to the uterus. • The placenta secretes progesterone to maintain pregnancy and prevent the embryo from aborting.

  4. During Pregnancy • A membrane called amnion encloses the developing embryo. • The amnion secretes a fluid called amniotic fluid. • The amniotic fluid acts as a shock absorber for protection. • When it becomes more recognisably human, it is no longer called an embryo but a fetus.

  5. Stages of birth • Dilation of the cervix • Delivery of the baby • Delivery of the afterbirth

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