Embryonic Development Quiz: Test Your Knowledge of Stages

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Questions and Answers

Match the following stages of development with their descriptions:

Zygote = Fertilized egg Embryo = Solid ball of cells at early stage of development Fetus = Embryo with all organs formed after 8 weeks Placenta = Structure attached to lining of uterus, provides oxygen and nutrients to embryo

Match the following structures with their functions:

Amnion = Fluid-filled sac protecting the embryo from damage Umbilical cord = Tube attaching embryo to placenta for nutrient exchange Heart = First organ to form in the embryo, pumps blood around the body Oviduct = Passageway for early embryo to travel to the uterus

Match the following terms with their meanings:

Implantation = Process where embryo sinks into lining of uterus Amniotic fluid = Fluid surrounding embryo inside the amnion sac Placenta attachment = Connection between placenta and lining of uterus for nutrient transfer Carbon dioxide exchange = Transfer of waste product from embryo's blood to mother's blood

Match the following nutrients with their source for the embryo:

Oxygen = Obtained from mother's blood through placenta Glucose = Nutrient passed across placenta to embryo's bloodstream Amino acids = Nutrients transferred from mother to embryo by means of placenta Carbon dioxide = Waste product passed from embryo's blood to mother's blood through placenta Signup and view all the answers

Match the following stages of development with their corresponding descriptions:

Zygote = The fertilized egg that first divides into two cells Embryo = The early stage in development where a solid ball of cells is produced Fetus = The stage after 8 weeks when all the organs are formed Amnion = The fluid-filled sac surrounding the embryo inside the uterus Signup and view all the answers

Match the following structures with their functions during embryonic development:

Heart = Pumps blood around the body of the embryo Placenta = Facilitates the exchange of oxygen and nutrients between mother and embryo Umbilical cord = Attaches the embryo to the placenta for nutrient exchange Amniotic fluid = Protects the embryo from damage and prevents unequal pressures Signup and view all the answers

Match the following processes with their descriptions during embryonic development:

Implantation = The process where the embryo sinks into the lining of the uterus Cell division = Continual division leading to the formation of tissues and organs Nutrient exchange = Obtaining oxygen and food from mother's blood through the placenta Formation of organs = Occurs after 8 weeks, marking the transition to fetus stage Signup and view all the answers

Match the following terms with their meanings related to embryonic development:

Oxygen exchange = Passage of oxygen from mother to embryo through placenta Carbon dioxide exchange = Transfer of carbon dioxide from embryo to mother's blood Amnion = Fluid-filled sac protecting the embryo inside the uterus Zygote division = Initial splitting of fertilized egg into two cells Signup and view all the answers

Match the following structures with their roles in supporting embryonic growth:

Oviduct = Passage for early embryo travel from ovary to uterus Placenta = Obtains oxygen and nutrients for embryo from mother's blood Uterus lining = Site where embryo sinks in a process called implantation Amnion = Encloses embryo in a protective fluid-filled sac inside uterus Signup and view all the answers

Match the following roles with their contributions to embryonic development:

Placenta function = Provides essential nutrients and oxygen for embryo growth Amniotic fluid purpose = Protects embryo from damage and maintains stable pressure Cell division importance = Leads to tissue and organ formation during embryonic stage Implantation significance = Marks the attachment of embryo to uterus for further growth Signup and view all the answers

Match the following substances with their roles in supporting embryonic life:

Glucose = Nutrient passing from placenta to embryo's bloodstream Amino acids = Essential building blocks transferred through placenta to support growth Amniotic fluid = Maintains stable environment for healthy development of embryo Carbon dioxide = Waste product removed from embryo's blood through placenta Signup and view all the answers

Match the following structures with their protective functions for the developing embryo:

Placenta attachment = Ensures separation of mother's and embryo's blood while facilitating exchange Umbilical cord role = Connects placenta to embryo for nutrient transfer without mixing bloodstreams Amnion function = Acts as a protective barrier around the developing embryo inside the uterus Mother's blood flow control by placenta = Prevents direct mixing of mother's and embryo's blood during nutrient exchange Signup and view all the answers

Match the following developmental milestones with their corresponding descriptions:

Heart formation timing = One of the first organs developed in early stages before tissue formation begins Organogenesis completion period = After 8 weeks, all organs are formed marking transition to fetus stage Amnion formation purpose = Encloses developing embryo in a fluid-filled protective sac inside uterus Implantation process significance = Attachment of early-stage embryo into uterine lining for further growth Signup and view all the answers

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Study Notes

Fertilization and Embryo Development

Fertilized egg (zygote) divides into two cells, then four cells, and continues to divide and grow into a solid ball of cells.
The embryo travels down the oviduct to the uterus and sinks into the lining, a process called implantation.

Embryo Growth and Development

After 8 weeks, the embryo is called a fetus, and all organs are formed.
The heart is one of the first organs to form and pumps blood around the embryo's body.
The embryo becomes enclosed in a fluid-filled sac called the amnion or water sac, protecting it from damage and unequal pressures.

Placenta and Umbilical Cord

The oxygen and food needed for the embryo's growth come from the mother's blood through the placenta.
The placenta is attached to the embryo by the umbilical cord and allows oxygen, nutrients, and waste to be exchanged between the mother and embryo.
Blood from the mother does not mix with the embryo's blood in the placenta.

Development Timeline

Figure 4.15 shows the human embryo's development from 5 to 35 weeks, surrounded by the amnion and placenta.

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