7 Questions
How does the placenta provide a large surface area for nutrient exchange?
The placenta contains blood spaces on the mother's side, surrounding the villi, which create a large surface area for glucose and oxygen to pass from the mother to the embryo.
What is the function of the placenta in embryonic development?
The placenta facilitates the transfer of nutrients, oxygen, and waste substances between the mother and the embryo.
Where are the villi located in the placenta?
The villi are located on the embryo's side of the placental tissue.
What triggers the birth of the child?
The child is born as a result of rhythmic contractions of the muscles in the uterus.
What impact did the US entry in 1917 have on the outcome of the First World War?
The Allies were strengthened and eventually defeated Germany and the Central Powers.
Which countries were part of the Central Powers in the First World War?
Germany and the Austrian empire
What were the initial gains made by Germany during the First World War?
Occupying France and Belgium
Study Notes
Placenta and Embryonic Development
- The placenta provides a large surface area for nutrient exchange through the branching of chorionic villi, which increases the surface area for diffusion of oxygen and nutrients from the mother's blood to the fetus.
- The placenta serves as a crucial organ for embryonic development, providing the fetus with oxygen, nutrients, and waste removal, while also producing hormones to maintain pregnancy.
Placenta Structure
- The villi are located in the placenta, specifically in the chorion, which is the outermost layer of the placenta.
Birth Trigger
- The birth of the child is triggered by hormonal changes, specifically the increase in estrogen levels, which stimulate the contraction of the uterus and the onset of labor.
First World War
- The US entry into the First World War in 1917 had a significant impact on the outcome, as it shifted the balance of power in favor of the Allies, leading to the eventual defeat of the Central Powers.
- The Central Powers consisted of Germany, Austria-Hungary, and the Ottoman Empire.
- Germany made initial gains during the First World War, including the invasion of France and Belgium, and the capture of significant territory in Eastern Europe.
Test your knowledge of embryonic development with this quiz on the formation and function of the placenta. Explore the crucial role of the placenta in providing nutrition and oxygen to the developing embryo.
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