Foetal Membrane And Amniotic Fluid
Foetal Membrane And Amniotic Fluid
In addition to the embryo proper, the blastoderm gives rise to certain other structures which lie outside the embryo. These are called as foetal membranes or extra embryonic membranes. These are essential for the complete development of the embryo. These include chorion, amnion , allantois and yolk sac.
Chorion
It completely surrounds the embryo and protects it . It consists of ectoderm outside and mesoderm inside. It takes part in the formation of placenta for the exchange of materials between the foetus and the mother.
Amnion
It is formed just above the embryo, It consists of ectoderm inside and mesoderm outside. The space between the embryo and the amnion is called as amniotic cavity. It is filled with a clear, watery fluid secreted by both the embryo and the membrane.
The amniotic fluid performs many important functions :-
1. Prevents drying of the embryo.
2. It cushions the embryo, protecting it against bumps and pressure of the maternal organs.
3. It maintains constant temperature and pressure.
4. It prevents bacterial infections.
5. It permits foetal movement.
Allantois:
It is a sac-like structure which arises from the gut of the embryo near the yolk sac. Allantois is formed of endoderm inside and mesoderm outside. In man the allantois is small and forms blood vessels of placenta and blood cells.
Yolk Sac:
It is a relatively larger sac-like structure formed below the embryo. It contains fluid, but not yolk. Its wall consists of endoderm inside and mesoderm outside. The yolk sac is non functional in human beings. The yolk sac is responsible for forming blood cells until about 6th week.
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My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
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Cheshta
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8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
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10thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
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Sharandeep Singh
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Manya
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
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Barkha Arora
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
