![alyxkellar06](/avatars/33392.jpg)
alyxkellar06
17.12.2021 •
Biology
What the meaning root of motor and motion
Solved
Show answers
More tips
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- P Philosophy Unbelievable stories of encounters with otherworldly forces...
- L Leisure and Entertainment How to Choose the Perfect Gift for Men on February 23rd?...
- H Health and Medicine How to Treat Whooping Cough in Children?...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
Ответ:
Ответ:
Ответ:
The correct answer is ''outer cells of the blastocyst'' The placenta and umbilical cord will derive from the trophoblast and from the internal cell mass all the tissues that will form the embryo.
Explanation:
The umbilical cord and the placenta are two fundamental organs for the development of the fetus, both come from the same initial cell as the fetus and for this reason they share a lot of genetic information with it. The placenta joins the wall of the uterus which is where the umbilical cord arises. As a general rule, it is attached to the upper, lateral, anterior or posterior part of the uterus. In some rare cases, the placenta can join the lower uterus, causing what is called placenta previa. The placenta begins to form at the same time that the fertilized ovum implants in the wall of the uterus and is essential for the correct development of the embryo, since it is through it and the umbilical cord to which it is subject that the fetus maintains the connection with the mother and receives all the nutrients it needs, in addition to the blood and oxygen it needs to breathe. The outer part of the placenta comes from the transformation of the uterus mucosa, while the inner part, called trophoblast, is configured from the embryo's own blasts, establishing a complex network of blood vessels, through which the fetus you will receive the nutrients you need. Also from the trophoblast, the chorionic plate is formed, in which the chorionic villi are located, which allow the embryo to attach to the wall of the uterus.