Human Development: Embryology and the origins of different types of tissues
What is necessary to make an embryo?
- An egg
- A sperm
- A womb
Embryology
- Study of the ordered formation, growth and formation, growth and development of the
embryos
- gametes
- fertilization and the development of the zygote
- Development of the embryo
- Development of the foetus
- Birth (39-40 weeks of gestation)
Why study embrylogy?
- Basic science
- from anatomical study to molecular biology
- factors that regulate embryonic development also play out in postnatal growth and repair
- 5% of live births will have a birth defect
Embryology is the study of the ordered formation, growth and development of the
Embryo
- Gametes
- Fertilization and the Zygote
- Development of the embryo
- Development of the foetus
- Birth (39-40 weeks of gestation)
Why study Embryology?
- Basic science
- From anatomical study to molecular biology
- Factors that regulate embryonic development also play out in postnatal growth and
repair
- 5% of births will have a birth defect
Embryology is foundation to understanding and advancing:
- In vitro fertilisation (IVF)
- Embryo Transplantation
- Stem cells
, - regenerative medicine
Clinical stages of Prenatal development
- Conception (fertilization)
- conceptus- all products
- Gestation (pregnancy)
- Trimesters (pregnancy) 3 month
Carniege Stages
- Classify embryonic development based on physical features, not y the age or the size of
the embryo
- There are 23 Carniege Stages, covering from the period from fertilization to the end of
the 8th week (56 days)
Human Development:
- Stage 1: Occurs approximately on Day 1. This is when FERTILIZATION occurs (zygote
is formed)
- Stage 5: Occurs approximately on Days 7 or 8. This is when BLASTOCYST
IMPLANTATION begins
- Stage 10: Occurs approximately on days 22-23. This is when NEURAL TUBE
DEVELOPMENT occurs
- Stage 13: Occurs on day 28. This is when LIMB BUDS appear
- Stage 23. Occurs on day 56. This is when the baby’s MAJOR ORGANS are formed.
Biological Stages of Prenatal Development
- Pre- embryonic
- Zygote - 16 days
- Cleavage (cell division)
- Blastocyst
- Implantation (conceptus attaches to uterus)
- Embryogenesis (formation of primary germ layers)
- Embryonic
- 17 days - end of 8 weeks
- Foetal
- 9 weeks - birth
What is necessary to make an embryo?
- An egg
- A sperm
- A womb
Embryology
- Study of the ordered formation, growth and formation, growth and development of the
embryos
- gametes
- fertilization and the development of the zygote
- Development of the embryo
- Development of the foetus
- Birth (39-40 weeks of gestation)
Why study embrylogy?
- Basic science
- from anatomical study to molecular biology
- factors that regulate embryonic development also play out in postnatal growth and repair
- 5% of live births will have a birth defect
Embryology is the study of the ordered formation, growth and development of the
Embryo
- Gametes
- Fertilization and the Zygote
- Development of the embryo
- Development of the foetus
- Birth (39-40 weeks of gestation)
Why study Embryology?
- Basic science
- From anatomical study to molecular biology
- Factors that regulate embryonic development also play out in postnatal growth and
repair
- 5% of births will have a birth defect
Embryology is foundation to understanding and advancing:
- In vitro fertilisation (IVF)
- Embryo Transplantation
- Stem cells
, - regenerative medicine
Clinical stages of Prenatal development
- Conception (fertilization)
- conceptus- all products
- Gestation (pregnancy)
- Trimesters (pregnancy) 3 month
Carniege Stages
- Classify embryonic development based on physical features, not y the age or the size of
the embryo
- There are 23 Carniege Stages, covering from the period from fertilization to the end of
the 8th week (56 days)
Human Development:
- Stage 1: Occurs approximately on Day 1. This is when FERTILIZATION occurs (zygote
is formed)
- Stage 5: Occurs approximately on Days 7 or 8. This is when BLASTOCYST
IMPLANTATION begins
- Stage 10: Occurs approximately on days 22-23. This is when NEURAL TUBE
DEVELOPMENT occurs
- Stage 13: Occurs on day 28. This is when LIMB BUDS appear
- Stage 23. Occurs on day 56. This is when the baby’s MAJOR ORGANS are formed.
Biological Stages of Prenatal Development
- Pre- embryonic
- Zygote - 16 days
- Cleavage (cell division)
- Blastocyst
- Implantation (conceptus attaches to uterus)
- Embryogenesis (formation of primary germ layers)
- Embryonic
- 17 days - end of 8 weeks
- Foetal
- 9 weeks - birth
