Histology Exam 3 Ph

Front 1

What does the yolk sac do?

Back 1

provide nutrient for the developing embryo

Front 2

What do the amniotic cavity do/hold?

Back 2

provide fluid for nutrients

Front 3

During week 2: what does the blastocyst (bilaminar disc) composed of?

Back 3

Trophoblast, epiblast,hypoblast, amniotic cavity, yolk sac

Front 4

What happens in week 6 and 7 of the embryonic development?

Back 4

teeth development begins with the initiation stage

Front 5

What happens in week 8 of the embryonic development?

Back 5

proliferation of dental lamina

Front 6

What happens in week 9-10 of the embryonic development?

Back 6

cap stage with proliferation and formation of dental sac

Front 7

What happens in week 11-12 of the embryonic development?

Back 7

Bell stage: Proliferation, histodifferentiation and morphodifferentiation

apposition and mineralization

maturation

Front 8

What is a blastocyst?

Back 8

A round ball of full of cells.
(like a tennis ball)

Front 9

When a blastocyst is cut in half. what is inside?

Back 9

Full of undiffernentiated stem cells (meaning they don't know what they want to be when they grow up)

Front 10

The increase numbers of embryonic cells within the blastocyst, tuns into a cell layer. The blastocyst is now called what?

Back 10

a bilaminar embryonic disc

Front 11

The bilaminar disc have two layers what are they?

Back 11

superior epiblast layer and a inferior hypoblast layer

Front 12

During week 3: the primitive streak is form from what or how?

Back 12

It is form within the bilaminar disc. The epiblast in the bilaminar disc invade the gap between the epiblast and hypoblast adding/making a new layer.

Front 13

In the primitive streak the cells are now what kind of cells?

Back 13

The cells are still stem cells but now they are differentiated cells because each germ layer knows what kind of cell it will be

Front 14

The cephalic end or head end of the trilaminar disc has an outline membrane called what? *2 type of names*

Back 14

Oropharygeal membrane or buccopharygeal membrane

Front 15

The caudal end or tail end of the trilaminar disc has an outline membrane called what?

Back 15

cloacal membrane

Front 16

The primitive streak forms the notochord which is the precursor of what?

Back 16

the spinal cord

Front 17

The trilaminar disc endoderm layer connects to the Oropharygeal (buccopharygeal) membrane and than forms what?

Back 17

gastrointestinal tract

Front 18

There are pouches that develop called Pharygeal pouches that are separated by a groove called what?

Back 18

Brachial clefts

Front 19

As the brachial clefts get more prominent they are now called what?

Back 19

Brachial arches

Front 20

There are 6 branchial arches. Which branchial arch forms the maxillary and mandibular part of your mouth?

Back 20

1st branch arch and small part of the 2nd

Front 21

Out of the 6 brachial arches one disappears, which one disappears?

Back 21

5th arch

Front 22

During week 4 of the embryonic period the ventral surface folds inward to form what?

Back 22

the stomadeaum, foregut, midgut, and hind gut

Front 23

During the 4th week of the embryonic period the buccopharygeal membrane begin to what?

Back 23

break down

Front 24

The first branchial arch begins to grow anteriorly to fuse what?

Back 24

the mandible

Front 25

The first branchial arch also bulges superiorly to form what?

Back 25

lateral maxillary process

Front 26

The frontonasal process moves forward and down separating into what?

Back 26

the medial nasal and lateral nasal process

Front 27

As the maxillary process continues to grow towards what?

Back 27

the midline and all three process eventually fuse together

Front 28

What does the medial nasal process make?

Back 28

phitrum and nasal

Front 29

What does the rathe's pouch develope into?

Back 29

pituitary gland

Front 30

Which direction does the tongue develope?

Back 30

upward

Front 31

what direction does the palatal shelf grow?

Back 31

downward direction

Front 32

What does the median palatal raphe made by?

Back 32

fusing of the palatel shelf

Front 33

The fusion of the lips happens _ weeks after fertilization

Back 33

3-6 weeks

Front 34

The development of the palate begins at _ week and ends at __ weeks

Back 34

begins week 6 and ends week 12

Front 35

What is significant about the mandible?

Back 35

no preexiting cartilage

Front 36

When does teeth formation begins?

Back 36

5th week post fertilization

Front 37

Enamel is a __ derivative

Back 37

ectoderm

Front 38

Lamina Propria (submucosa) consist of what?

Back 38

loose irregular tissue & the bone develops in this area

Front 39

What are the 3 stages of tooth developement?

Back 39

bud stage
cap stage
bell stage

Front 40

what are the 4 phases of tooth developement?

Back 40

proliferatiive phase
proliferative phase
morphodifferentation
histodifferentation

Front 41

dentin is form from what?

Back 41

mesoderm

Front 42

what enclose all the active tissue during tooth formation?

Back 42

dental sac

Front 43

As the primary stock develope we get a 2nd ? what, that developes from the primary stock?

Back 43

2nd lamina or successional

Front 44

In the bell (enamel organ) there are 4 types of cell what are they?

Back 44

outer enamel epithelium
inner enamel epithelium
stratum intermedium
stellate recticulum

Front 45

Every pulp in every tooth has this line of cell, it comes from the mesoderm and eventually going to make dentin

Back 45

odontoblasts

Front 46

What are pluri potential cells and what do they become?

Back 46

these cells don't know what they want to become and eventually become odontoblast

Front 47

what are the most numerous cells in the pulp?

Back 47

fibroblast

Front 48

I.E.E. tall columar epithlium as it develope the nucleus is at the base end, this is refer to as?

Back 48

pre ameloblast

Front 49

When odontoblast move close to the base end of the I.E.E. tall columar epithilum the nucleus move to the apex end and are now called what?

Back 49

ameloblast

Front 50

What do ameoblast do?

Back 50

secrete enamel

Front 51

1 out of 750 births develops cleft lip or cleft palate or both. What are some external influence that can cause this?

Back 51

Pregnant women who smoke or drink while pregnant
men who smoke weed prior to insemination

Front 52

The Inner enamel epithelium is primarly compose of what type of cells?

Back 52

tall columnar

Front 53

the outter enamel epithelium compose primarly of what kinds of tissue?

Back 53

short columnar or tall cubodial

Front 54

what kind of shape is the stellate reticulum?

Back 54

star shape

Front 55

decribe the stratum intermedium cells?

Back 55

short and flat