OralHisto Prelims Exam Lec Flashcards
what week is fetal period
4-12th week
median tongue bud
tuberculum impar
as the zygote travels down the ______ it undergoes?
- oviduct
- cleavage without increasing its size
what branchial arch:
epiglottis
4th branchial arch
inner cell mass arises into
embryo
the inner cell mass differentiates into the?
bilaminar germ disc
triangular median swelling
tuberculum impar
specialized type of cell division that reduces the chromosome number by half, creating 4 haploid cells, each genetically distinct from the parent cell
meiosis
inner cell mass
embryoblast
stacked bilateral swellings of tissue inferior to the stomodeum
pharyngeal arches
when cells realign themselves to form a fluid-filled hollow ball, it is called?
(a cavity)
blastocyst
most facial structures develops through
fusion
the lateral nasal processes forms the?
ala of the nose
the pharyngeal arches is covered by?
ectoderm
indicates the fusion of the palatal shelves
median palatine raphe
sperm binding
sperm glycosyltransferases and ZP3 receptors on Zona Pellucida
what is the temporary structure that separates the stomodeum from the primitive pharynx
oropharyngeal membrane
a process of cell duplication or reproduction during which one cell gives rise to 2 genetically identical daughter cells
mitosis
vertebra, ribs, rib cage
sclerotome
forms within each side of the arch
Meckel’s cartilage
facial development includes the formations of:
primitive mouth (stomodeum)
mandibular arch
maxillary process
frontonasal process
nose
the mandibular arch gives rise to?
lower face (including lower lip)
mandibular teeth
muscles of mastication
tongue
when the median nasal processes fuse together externally, it forms the?
root to apex of the nose
tubercle of the upper lip
philtrum
inverted v-shaped groove that marks the fusion of the body and base of the tongue
sulcus terminalis
action of 1 group of cells on another that leads to the establishment of the developmental pathway in the responding tissue
induction
the frontonasal process gives rise to?
upper face
forehead
nose bridge
primary palate
nasal septum
medial nasal process
the intermaxillary segment gives rise to:
philtrum
premaxillary part of the maxilla (incisors)
primary palate
fertilization occurs in?
the ampulla of the uterine tube
what happens to the zona pellucida prior to implantation
becomes stretched, thinned out and gradually disappears
true or false:
most processes are formed from mesenchyme provided by the neural crest cells
true
bilaminar germ disc
epiblast (ectoderm)
hypoblast (endoderm)
series of mesodermal thickenings appear on the lateral wall
buccopharyngeal membrane
change in identical embryonic cells to become distinct structurally and functionally
differentiation
what structure is prominent in the cephalic end
buccopharyngeal membrane
outer part of the nasal pits
lateral nasal processes
on what week does palatal development start
5th week
what separates the primitive pharynx from the stomodeum
buccopharyngeal membrane
what creates the new embryonic layer mesoderm
mesenchyme
distal tongue buds
lateral lingual swellings
before the trophoblast begins to implant the blastocyst into the uterine endometrium, it differentiates into?
syncytiotrophoblast
rounded areas of specialized, thickened ectoderm found at the location of the developing special sense organs
placodes
when the embryo consists of 16-32 cells it is called?
morula
develops from independent swellings located internally on the floor of the primitive pharynx
tongue
first 8 weeks
embryonic period
the first event in the development of the face (4th week prenatal)
disintegration of the membrane
attainment of adult function and size due to proliferation, differentiation, and morphogenesis
maturation
zygote >
blastula
what week does the primitive mouth increase in depth and enlarges
4th week
a transient structure that marks the start of gastrulation
primitive streak
gives rise to the primary palate
intermaxillary segment
this indicates where the mandible is formed by fusion of right and left mandibular processes
mandibular symphysis
musculature of the back ribs and limbs
myotome
initially located between these adjacent swellings due to proliferation, differentiation and morphogenesis
cleft/furrow
development of specific tissue structures or differing forms due to embryonic cell migration or proliferation and inductive interactions
morphogenesis
a central band of cells that extends the length of the embryo
neural plate
base of tongue branchial arch
2, 3, 4th B.A.