7.early embryonic development and cell differentiation Flashcards
The horseshoe-shaped intraembryonic coelom is also bent. The future pericardial cavity lies ventrally. The pericardiaco-peritoneal canals lie dorsal to the septum transversum and eventually form the pleural cavities.
the importance of extra embryonic mesoderm
it persists proximally for a time in the umbilical cord
it is important in the development of the gut
what does the pericardial, pleural and peritoneal cavities house
heart
lungs
gut tube
(pericardiaco-peritoneal canals forms the lungs)
grastulation
cells migrate within the blastocyst to locations that will define the structure of embryo
three germ layers arise (endoderm, ectoderm and mesoderm)
what are the initial same types of stem cells called
pluripotent emrbryonic stem cells
How do cells control what genes are expressed and translated
transcipton factors
explain divsion of labour in cells
different signals can cause embryonic cells to select specific parts of the DNA which can be used synthesise proteins
Regulative development
involves the interaction of adjacent cells within ‘embryonic morphogenic fields’. This gives flexibility to differentiation
Two characteristics that stem cells display
- unspecialised and can divide repeatedly over a long period of time
- under certain conditions, they can be induced to differentiate into cells with special functions (can be important in treatment)
mitosis without differentiation
early zygote cleavages
