The early embryology

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Information about The early embryology

Published on July 3, 2016

Author: AntonniKendallPrades


1. The Early Embryology Part 1, the origins

2. The Primordial of Embryology • Embryology is made by forming its shape and the embryo can grow • Let us bring the start of out our journey • Let’s start with the beginnings

3. An embryo’s origins Of biological evidence an embryo is taking shape of its life and the forms can be deter, mined Our biological systems are formed in millions of cells, our shaping continues Take a picture of an embryo An embryo is a developing organism which is prepared for studies. They consist of several stages which are yet to be complete. All stages include the fetus, a model organism can be studied in ultrasounds 8 weeks you should see a baby in the womb He can become the ultimate progress of our lifes

4. Stage I: The Ovum An ovum is a tiny cell which is composed of cells that help the embryo develop its features 1 day an embryo started its journey

5. Development comparison Day 1 Egg Time Days DV Size Egg 23 hr 1 day Egg 0.1 mm Day 2 Egg Time Days DV Sz. Two cell 48 hr 3 2 days Cleav. 0.1 mm

6. Day 3 ST Days Time ra Dev Place 2 72 hr 49-72 hr Morula Fallopian Day 4 ST DAYS range Dev Place 3 96 hr 73-96 hr Ear Blast Uterus

7. Day 2 • Day 2 Day 2

8. Day 2 Day 2 Size: 0.1 mm Dev char-Two cell stage. Place is fallopian tube. The embryo begins cleaving 26 hours and 45 hours another division and ends in 48 hours

9. Day 3 Size: 0.1 mm Dev time: 49-72 hrs Start of development: 8 cel stage cleaving End of Development: Morula

10. Day 4 Age: 96 hr Dev char: Blastocyst v cavity formed Range: 73-96 hr Place: Uterus Scale bar: 0.1 mm

11. Day 5 Age Dev Place Range Int 120 hr Blastocy st Uterus 97-120 hrs Formatio n of cavity Day 6 Age Dev Place Range Int 144 hr Blastocy st (late) Uterus 121-144 hr Hatching

12. Day 5 Dev char: Blastocyst Diameter: 0.2 mm (when hatched) Start for development: tail Starts hatching End of dev: Hatched Early: left Late: right

13. Day 6 Diameter: 0.2 mm Dev time: 121-144 hr Dev char-Implantation of the blastocyst, and placental formation Tissues included-Embryoblast, Trophoblast, Blastocyst cavity And other

14. Day 6-Ca Characteristics This way the implantation has begun 145 hours, and the trophoblast contacts with the uterine epithelium, forming a placental tissue called syncitioblast The embryonic mass contains epiblast and hypoblast, epiblast becomes ectoderm and amnion, end hypoblast becomes endoderm and yolk sac The layers from a day 6 embryo is bilaminar

15. Follicle development • Follicle development is were the follicles in her ovary begin to develop. The follicles start at 3 stages. Graafian follicle is the lare largest follicle. It often ruptures fluid filled cavities and the oocyte torn off the cumulus cells • Becomes corpus luteum after this stage

16. Follicle dev The four stages 1-Primary follicle 2-Secondary follicle 3-Tertiary follicle 4-Graafian follicle 5-Corpus luteum 6-Degenerating corpus luteum 7-Cycle continues

17. Fertilization • Fertilization is a process which the egg is fertilizing. At 0 days mitotic divisions are forming outside ovum, they are 3 polar bodies present • Next, the prick pronuclei fuse together and become a zygote’s nucleus • Finally the ovum continues progress until it reaches the fallopian tube as morula, uterus as blastocyst and at 7 days begins attachment

18. Fertilized Egg Fertile Eggs have a pronucleus come together

19. Human sperm A sperm is a small thing that enters the cervix. First, when a sperm starts as a cell, it forms a tail, the cytoplasmic mass decreases and the sperm is formed. When reaching the ovum it secretes a joy h h jo juicy fluid that fertilized its egg This is produced by a mature male

20. Parts of embryology • See you soon on July 7, Part 2, the days between 7 days and to week 3 and organogenesis • See you soon July for Part 3, the days between 21 to 28 • Part 4, days between 4 to 8 • Part 5, the 10 week old fetus

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