1. EMBRYONIC DEVELOPMENT

2. OVERALL IDEAS DEVELOPMENT BEGINS AFTER FERTILIZATION OF THE EGG BY THE SPERM ZYGOTE IS DEFINED AS A FERTILIZED EGG CELLS BECOME MORE DIFFERENTIATED AS THE STAGES OF DEVELOPMENT CONTINUE THE ZYGOTE WILL NOW GO ON TO DEVELOP INTO AN EMBRYO AND EVENTUALLY A FETUS

3. STAGES OF EMBRYONIC DEVELOPMENT CLEAVAGE BLASTULA FORMATION GASTRULA ORGANOGENESIS EVENTUALLY BIRTH

4. Our Journey begins at FERTILIZATION-DESCRIBE WHAT HAPPENS HERE?

5. FERTILIZATION FUSION OF SPERM AND THE EGG A ZYGOTE IS FORMED HAPLOID IS NOW DIPLOID (46 CHROMOSOMES) NOW WE CAN DEVELOP

6. STAGE 1-CLEAVAGE: DESCRIBE WHAT HAPPENS HERE?

7. STAGE 1-CLEAVAGE RAPID MITOTIC CELL DIVISION  MAKING MORE CELLS FOR THE INDIVIDUAL NO CELL GROWTH ALL CELLS ARE EMBRYONIC NOT DIFFERENTIATED  NO FATE YET. CAN FORM INTO ANY CELL TYPE THIS STAGE IS WHERE THE ORGANISM IS CONSIDERED AN EMBRYO

8. STAGE 2-BLASTULA FORMATION- WHAT HAPPENS HERE?

9. STAGE 2- BLASTULA STAGE ROUND HOLLOW BALL OF WITH A SINGLE LAYER OF CELLS. FLUID FILLED WITH CYTOPLASM CELLS CONTINUE TO DIVIDE

10. STAGE 3-GASTRULATION

11. STAGE 3 GASTRULATION INDENTATION OF BLASTULA FORMS 3 DISTINCT LAYERS  ECTODERM: DEVELOPS SKIN,LINING OF ORGANS  OUTER  MESODERM: DEVELOPS MUSCLES,NERVOUS SYSTEM,BLOOD,BONE  MIDDLE  ENDODERM: DEVELOPS INNER SYSTEMS (DIGESTIVE,RESPIRATORY)  INNER

12. ORGANOGENESIS

13. STAGE 4 ORGANOGENESIS CELLS OF THE LAYERS NOW HAVE A FATE  DIFFERENTIATED. CAN NOT FORM ANY CELL TYPE THEY WANT.THEY NOW HAVE A JOB LAYERS DEVELOP INTO TISSUES AND ORGANS

14. FULL GASTRULATION OF EMBRYO MOVING INTO A FETUS

15. HOW DOES THIS IMPACT PREGNANCY? 0-3 MONTHS  ZYGOTIC/EMBRYONIC STAGE  CLEAVAGE/BLASTULA 3-6 MONTHS  GASTRULA AND SOME ORGAN DEVELOPMENT 6-9 MONTHS  FURTHER ORGAN DEVELOPMENT, MATURITY,AND FUNCTION ~9 MONTHS  FETUS IS BORN

16. FETUS IN UTERO(IN UTERUS) CERVIX UMBILICAL CORD PLACENTA AMNIONIC SAC OVIDUCT UTERUS

17. IMPORTANCE OF PLACENTA CONTAINS A NETWORK OF BLOOD VESSELS WHICH SUPPLY THE FETUS WITH OXYGEN AND NUTRIENTS JOINS WITH THE UMBILICAL CORD TO SUPPLY THE FETUS WITH NEEDED NUTRIENTS

18. THOUGHT QUESTION WHY ARE EMBRYONIC STEM CELLS SUCH A HOT TOPIC IN SCIENCE?

19. IDEAS TAKING EMBRONIC STEM CELLS CAN HELP MAKE ANY TYPE OF CELL  NOT FATED RESULTS IN GROWING OF NEW TISSUES OR PERHAPS ORGANS PROBLEM IS TAKING IT FROM AN UNBORN CHILD