craniofacial development and disorder Flashcards
describe developmental biology
study of the processes by which organs grow and develop
what is induction?
the process in which an undifferentiated cell is instructed by species organisers to produce a morphogenic effect
what is proliferation?
controlled cellular growth and accumulation of byproducts
what is morphogenesis?
development of specific tissue structure or differing form due to embryonic cell migration or proliferation and inductive interactions
what is maturation?
attainment of adult function and size due to proliferation, differentiation and morphogenesis
describe cytodifferentiation
is the development of different cell types
describe histodifferentiation
is the development of different histology tissue types within a structure
describe morpho differentiation
is the development of the differing morphology, which makes up its structure or shape for each organ or system
describe morphogenesis
is the process of development of specific tissue structure or shape
what does instructive mean?
the ability of one tissue to determine specific patterns of morphogenesis and differentiation that will develop in an associated tissue
what does permissive (or faciitative) mean?
the ability of an interacting tissue provide certain conditions that is necessary for its committed partner tissue to progress to full expression of its pre-determined phenotype
Epithelial mesenchymal interaction
Epithelial cells cover the inside and outside of the surfaces of the body, as well as contributing to human life cycle from embryogenesis to adulthood
Mesenchymal stem cells
are stromal cells that develop into connective tissue, blood vessels and lymph. Mesenchyme is embryonic connective tissue that is undifferentiated
Prenatal development
- Preimplantation Period - 1st week
- Zygote (fertilised egg) develops/differentiate into a Blastocyte (ball of cells) which implants into the uterus
Embryonic period
- 2nd week to end of 8th week
- Blastocyte develops into a disc of cells, which then folds into a folded embryo