x exam 2 body cavity formation II

Question 1

paraxial mesoderm is

Answer 1

axial parts of musculoskeletal system

Question 2

paraxial mesoderm forms

Answer 2

muscles of appendicular musculoskeletal system

Question 3

intermediate mesoderm forms

Answer 3

urogenital system (majority)

Question 4

lateral plate mesoderm extends

Answer 4

extraembryonic as part of fetal membranes

Question 5

lateral plate mesoderm is somatic mesoderm associated with

Answer 5

ectoderm

Question 6

somatic mesoderm associated with ectoderm forms

Answer 6

dermis of integumentary system

connective tissues of limbs (bones, cartilage, ligg, etc.)

Question 7

lateral plate mesoderm splanchnic mesoderm associated with

Answer 7

endoderm

Question 8

splanchnic mesoderm associated with endoderm

Answer 8

respiratory system
GI system
caudal most parts of urogenital system (exits)

Question 9

lateral plate mesoderm subdivision

Answer 9

creates space inbetween = coelom

Question 10

coelom portion within embryo is the

Answer 10

intraembryonic coelom

Question 11

coelom portion outside

Answer 11

extraembryonic coelom

Question 12

flat trilaminar disc

Answer 12

C-shaped embryo with midventral opening

Question 13

yolk stalk and allantoic stalk pass through

Answer 13

opening

Question 14

head fold: cranial extend folds

Answer 14

ventrally

Question 15

cardiogenic area begins ____

Answer 15

cranially

Question 16

folding relocates cardiogenic area _____

Answer 16

ventrally as endocardial tube is forming

Question 17

transverse septum

Answer 17

thickening of mesoderm caudal to cardiogenic area after ventral relocation

Question 18

buccopharyngeal (oropharyngeal membrane)

Answer 18

region where ectoderm in contact with endoderm is the division of developin gmouth and foregut

Question 19

_____ connects GI tract and mouth

Answer 19

degeneration

Question 20

_____ amniotic fluid

Answer 20

swallow

Question 21

tail fold

Answer 21

caudal end of embryo folds ventrally

Question 22

cloacal membrane

Answer 22

region where ectoderm in contact with endoderm

will become anus and urogenital openings

Question 23

lateral edges of embryonic disc fold ____

Answer 23

ventrally and laterally until they meet

Question 24

lateral folds fuse with

Answer 24

each other, head fold, and tail fold (except at umbilicus)

Question 25

endoderm to

Answer 25

endoderm

Question 26

splanchnic mesoderm to

Answer 26

splanchnic mesoderm

Question 27

somatic mesoderm to

Answer 27

somatic mesoderm

Question 28

ectoderm to

Answer 28

ectoderm

Question 29

gap at umbilicus is for

Answer 29

yolk stalk, allantoic stalk, vessels

Question 30

fusion of lateral folds closes

Answer 30

intraembryonic coelom; no longer continuous with extraembryonic coelom

Question 31

endoderm to endoderm becomes

Answer 31

primitive gut tube

Question 32

lateral body fold fusion establishes ____ membranes

Answer 32

serosal

Question 33

somatic mesoderm becomes

Answer 33

parietal serosa (lines walls)

Question 34

splanchnic mesoderm

Answer 34

visceral serosa (lines organs)

Question 35

mesentery suspends primitive gut in

Answer 35

intraembryonic coelom

Question 36

single, common intraembryonic coelom has ___ cavities

Answer 36

4

Question 37

these cavities include

Answer 37

pericardial cavity
L and R pleural cavities
Peritoneal cavity

Question 38

as the head folds, transverse septum becomes

Answer 38

caudal to heart

Question 39

transverse septum attached _____ to body wall

Answer 39

ventrally and laterally to body wall

Question 40

partial division of coelom cranially becomes

Answer 40

primitive pericardial cavity

Question 41

partial division of coelom caudally becomes

Answer 41

primitive peritoneal cavity

Question 42

either side of primitive gut communicates

Answer 42

dorsally (right and left pericardioperitoneal canal

Question 43

closing pericardial cavity

Answer 43

R and Ll pleuropericardial folds; form in lateral wall of primitive pericardial cavity

Question 44

R and L pleuorpericardial folds fuse to

Answer 44

together and to mesenchyme of foregut

Question 45

pleuropericardial folds came from

Answer 45

lateral body wall

Question 46

inner serous pericardium from

Answer 46

somatic mesoderm

Question 47

outer serous mediastinal pleura from

Answer 47

somatic mesoderm

Question 48

somatic mesoderm =

Answer 48

parietal serosa

Question 49

somatic mesoderm composes the

Answer 49

parietal pericardium and parietal pleura

Question 50

R and L pleuroperitoneal folds also grow and fuse with

Answer 50

transverse septum; closes pleural cavities

Question 51

diaphragm is composed from

Answer 51

transverse septum
pleuroperitoneal folds
mesenchyme of developing esophagus and body wall

Question 52

myoblasts of transverse septum migrate to

Answer 52

pleuroperitoneal membranes

Question 53

these myoblasts form the

Answer 53

muscular periphery of diaphragm

Question 54

central, remaining cells of transverse septum become

Answer 54

central tendon of diaphragm

Question 55

congenital abnormalities of diaphragm is

Answer 55

failure to close

Question 56

congenital diaphragmatic hernia

Answer 56

abdominal viscera in thoracic cavity

Question 57

congenital diaphragmatic hernia includes

Answer 57

pleuroperitoneal hernia

peritoneal-pericardial hernia

Question 58

most common diaphragmatic hernia is

Answer 58

acquired usually due to trauma

Question 59

pleuroperitoneal hernia occurs when

Answer 59

pleuroperitoneal folds fail to develop or fail to fuse with esophageal mesenchyme or transverse septum

Question 60

_____ more common

Answer 60

left

Question 61

____ typically herniate

Answer 61

stomach and intestines

Question 62

peritoneal-pericardial hernia

Answer 62

defect in transverse septum development

Question 63

______ tend to herniate

Answer 63

liver, pylorus of stomach and intestines tend to herniate

Question 64

what is the most common congenital hernia of domestic animals

Answer 64

peritoneal-pericardial hernia