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Embryology/Embryogenesis Summarised Notes

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  • Course
  • Anatomy and Physiology
  • Institution
  • University Of Reading (UoR)
  • Book
  • Langman\'s Medical Embryology

This is a summarised note for Embryology which consists of lecture notes and books. I made this for exam revision (and so it is very concise and includes everything about this topic) and was very useful when used alongside test/flashcards/quizzes (space repetition. ...

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Document information

  • June 4, 2022
  • 14
  • 2020/2021
  • Class notes
  • Natasha barret
  • All classes

Subjects

  • embryology
  • embryogenesis
  • pathology of embryology
  • clinical aspect and relevance to embryology

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  • Anatomy and Physiology
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Embryology/Embryogenesis
Summary Notes
Week

Colouring

Rep 1

Ageing/Physiology

Rep 3

Flashcard


Introduction to Embryology
Cellular concepts include:

Communication - cell signalling

Migration

Proliferation

Differentiation

Apoptosis

Stages of Embryology



Embryology/Embryogenesis Summary Notes 1

, There are 2 main stages of embryology:

Week 1-8 = Embryonic Stage

Week 9-birth = Foetal stages

(These weeks are different to weeks of a pregnancy or weeks of gestation, where
the mother is counting back from the first day of her period)
The period from fertilization to implantation of the blastocyst into the uterus takes 2
weeks. (If egg is fertilized then the woman doesn’t menstruate.

Process of Embryogenesis
Week 1 (Bilaminar Disc Formation)

Fertilisation - ( sperm + egg = Zygote)

12-24 hr: Mitosis- The early zygote proliferate to produce a ball of cells that
make its way along the uterine tube towards the uterus

Day 3: Morula- This is a ball of cells which become compact and tightly
squashed together.

Day 5: Blastocysts- is a fluid filled space in the morula. (embryoblast and
trophoblast)

Trophoblast - They pull luminal fluid from the uterine cavity into the
center of the morula.

Day 6: Implantation Starts: By implanting, the cell grows in the cell and
interact with the uterine wall.

The blastocyst attaches to the lining of the uterus, triggering changes to
the trophoblast and uterus lining in preparation for the implantation of
the blastocyst into the uterine wall.




Embryology/Embryogenesis Summary Notes 2

, Day 7: Differentiation: The cell Mature and specialised



💡 (During cell development, cells become specialised as they move from
a multipotent stem cell type towards (to) a cell type with a particular
task.


Trophoblast specialize into :

1. Syncytiotrophoblast (invasive)

2. Cytotrophoblast

Embryoblast specialized into:

Epiblast

Hypoblast




Week 2- Choronic Cavity Formation


Embryology/Embryogenesis Summary Notes 3

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