Organogenesis Flashcards
Summary: (FIGR)
- _________ and the pre-implantation period - formation of the morula and blastocyst
- __________
- __________ - formation of the three germ layers
- __________ of the 3 week old embryo
a. Head, tail, neural plate, notochord
- Fertiliztion
- Implantation
- Gastrulation
- Regioinalization
In what period of embryogenesis does organogensis begin?
Somite period
If something traumatic or dangerous happens in the first __ weeks of development, you’ll see the development of major congenital anomalies.
8 weeks
The notochord induces formation of the _________ ________ (neurulation) in the overlying ectoderm. This then becomes a ________ ________ by active cell proliferation and changes in cell shape.
Neural plate –> Neural groove
The neural tube begins closing in the middle and has open ends which are referred to as the ________.
neuropores
Which end expands rapidly due to differential growth?
anterior
The failure of the posterior neural tube closure.
Spina bifida
The failure of anterior neural tube closure.
Anencephaly
The failure of the neural tube to close head to tail.
Craniorachischisis
Problems with neurulation can be prevented with increase of what in your diet?
folic acid
Mesoderm Differentiation:
- Somatopleural includes _________ and _________.
- Splanchnopleural includes _________ and __________.
Somatopleural (mesoderm and ectoderm)
Splanchnopleural (mesoderm and endoderm)
The paraxial mesoderm becomes _________, which are transient organs that organize themselves without cell differentiation (primary organs). Also referred to as blocks of mesoderm that are located on either side of the neural tube in the developing vertebrate embryo.
somites
The segmental (metamere) partitioning of the spine, the neural tube, the trunk wall, and the ribs depend on what?
the ordered arrangements of the somites
The somite consists of what three components?
dermatome, myotome, and sclerotome
Which component of the somite forms the connective tissue of the dermis?
dermatome
