Embryology Flashcards
(16 cards)
What term is given to the developing baby from when fertilisation occurs to the end of week 3?
Conceptus
What term is given to the developing baby from week 4 to week 8?
Embryo
What term is given to the developing baby from week 9 to birth?
Foetus
What are the 6 phases of embryonic development?
Gametogenesis Fertilisation Cleavage Gastrulation Morphogenesis Organogenesis
What occurs in gametogenesis?
Formation of germ cells (sperm, ovum)
What occurs in fertilisation?
Formation of zygote
What happens in cleavage?
Rapid cell division
What happens in gastrulation?
Formation of germ layers (ectoderm, mesoderm, endoderm)
What happens in morphogenesis?
Folding of embryo forms 3D human-like shape
What will the ectoderm go on to produce?
Skin
Nervous system
What will the mesoderm go on to produce?
Organs
What will the endoderm go on to produce?
Lining of gut
Lung bud
What is the zona pellucida?
Tough protein coat surrounding oocyte to give it protection
In cleavage, zygote divides into morula and then further into blastomeres. How many celled blastomeres are totipotent (can give rise to any cell/structure)?
8-cell blastomeres are totipotent
What is the amazing thing about development, according to Veronica Van Heyningen?
The amazing thing about development is not that it sometimes goes wrong, but that it ever succeeds.
What are the 4 components of Tetralogy of Fallot?
Pulmonary stenosis
Right ventricular hypertrophy
Overriding aorta
Ventricular septal defect
